Lightroom 4 on Windows 7 32-bit, performance?

I'm using an HP 32-bit dual-core PC, Windows 7, 4 GB RAM. Yes, I know, I should upgrade to a 64-bit computer but it's just not in the cards right now. Lightroom 3.6 performs reasonably well, well enough for me at least. I tried the Lightroom 4 beta, and it was really quite sluggish. And, it might be my imagination, but it seemed to even affect Lightroom 3. When I removed the beta Lightroom 3 "seemed" to improve in performance.
I like the new version of Lightroom, but I'm seeing horror stories and am concerned about performance. All of my cameras have full support in Lightroom 3. I get satisfactory results. And none of my reading so far has sold me on switching to the new version. Yes, I know, the new process is far superior. But from my evaluation it is not so superior as to justify sluggish performance. Is anyone using Lightroom 4 on a computer with similar specs as mine? If so, what are your experiences. In the meantime, I will just "suffer" as I continue to use Lightroom 3.6.

Judy,
Thanks for clarifying, and I'm inclined to agree with you: Your previous PV2010 workflow is invalid in PV2012, ruined if you will...
But at least you have acknowledged it, which is step 0. Accepting it is step 1...
Trying to map PV2010 skills 1-1 into PV2012 is a recipe for frustration.
PV2012 controls are quite unlike any other editor I've ever used (including Lightroom 3).
They have image-adaptability, and some intelligence: they don't always do the same thing all the time.
So yes:
1. Unlearn everything you know about PV2010.
2. Learn PV2012.
In a nutshell:
For normal photos:
* exposure sets midtone level, not highlight level (highlights will usually be too bright, initially, when exposure is set correctly).
* contrast sets midtone separation
* -highlights to keep highlights from being too bright.
* +shadows to keep shadows from being too dim.
* -blacks & +whites for full dynamic range.
For unusual photos:
-whites to keep highlights from being too bright.
+blacks to keep shadows from being too dim.
For all other photos:
A combination of the above...
PS: positive highlights together with negative shadows is typically reserved for:
* Unusual raw cases, when you want a flatter look (you want to suppress tonal detail / contrast), or
* Tweaking already baked jpegs.
Same-signed highlights & shadows values usually means you have exposure set wrong.
Cheers,
Rob

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Hi
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Troubleshoot installation problems in Photoshop Lightroom on Windows Vista

This document can help you to resolve system errors that occur while you use Adobe Photoshop Lightroom on Windows Vista. System errors can manifest in many different ways, including (but not limited to) the following:
A blank or flickering dialog box
A frozen cursor or screen
A blue screen
An unexpected restart
An error message such as:
"Setup is unable to load the installation script file."
"Unable to create a directory under C:\Windows\System. Please check write-access to the directory."
"Uninstalling: C:\Program Files\Adobe\Adobe Photoshop Lightroom refers to a location that is unavailable. It could be on a hard drive on this computer, or on a network. Check to make sure that the disk is properly inserted, or that you are connected to the Internet or your network, and then try again. If it still cannot be located, the information might have been moved to a different location."
Note: If you attempt to install Photoshop Lightroom to a drive that doesn't have the minimum required space available, the installation will fail. You must then completely reinstall to another location that has sufficient free space.
Many different factors can cause system errors, including conflicts among device drivers, applications, operating system settings, hardware, and corrupt elements in specific files. Although a system error may occur only when you work with Photoshop Lightroom, Photoshop Lightroom may not necessarily be the cause; it may be the only application that uses enough memory or processor cycles to expose the problem.
To benefit most from this document, perform the tasks in order. Keep track of the tasks that you perform and the results of each, including errors and other problems. Adobe Technical Support can use this information to better assist you if you need to call.
You must be logged on as an administrator to perform some of the procedures in this document.
Important: Some of the procedures in this document may initiate a User Access Control dialog that asks for your permission to continue. Read the details in the dialog to determine if you want to continue. If you choose to cancel the dialog, then you will not be able to continue with that troubleshooting step.
The steps in this document that refer to the Control Panel are in reference to the Classic view. For information on switching the Control Panel to the Classic view and many other common OS procedures, see Common Microsoft Windows Vista procedures (TechNote kb401275)
Some of these procedures require you to locate hidden files and hidden folders. Some procedures require you to locate files by their full file names, which include extensions (for example, example_filename.ini). By default, Windows Explorer doesn't show hidden files, hidden folders, and file name extensions that it recognizes.
To show hidden files, hidden folders, and all file name extensions in Windows Explorer:
In Windows Explorer, choose Organize > Folder And Search Options.
Click the View tab in the Folder Options dialog box.
In Advanced Settings, select Show Hidden Files And Folders.
Deselect Hide Extensions For Known File Types.
Click OK.
Note: The procedures in this document are based on the default interface of Windows Vista. If the interface is customized, some procedures may vary. For example, a commonly encountered difference is the navigation to Control Panel from the Start menu: You may navigate Start > Settings > Control Panel instead of Start > Control Panel. Additionally, the procedures in this document assume you are using the Classic View of the Control Panel: To view the Control Panel in the Classic View, click Switch To Classic View on the Control Panel navigation bar on the left side of the window.
Beginning troubleshooting
The tasks in this section can help you resolve the most common system errors. Before performing any of these tasks, back up all personal files (for example, Photoshop Lightroom files you created). Always restart the computer after a system error occurs to refresh system memory. Continuing to work without restarting the computer may compound the problem.
1.Make sure that the system meets the minimum requirements for PhotoshopLightroom.
Photoshop Lightroom may not run correctly on a system that doesn't meet the following requirements:
Intel Pentium 4 or equivalent processor
Microsoft Windows XP, Windows Vista, Windows 7
768 MB of RAM (1 GB recommended)
1 GB of available hard-disk space
CD-ROM drive
In addition to these requirements, a video card that supports 24-bit (16 million) or more colors, and a resolution of 1024 x 768 or higher, is recommended.
* Photoshop Lightroom 1.0 will install and run on Windows Vista but Adobe cannot guarantee the quality of the software experience until Adobe fully certifies Photoshop Lightroom for use on Windows Vista.
To check basic system information, such as processor speed and how much RAM is installed, choose Start > Control Panel > System.
2. Delete previously installed application files, especially if you had the public beta version of Photoshop Lightroom installed.
To delete files from a previous Adobe Photoshop Lightroom installation attempt:
Choose Start > Control Panels > Add or Remove Programs.
Select Adobe Photoshop Lightroom and choose to remove it.
Close the Add Or Remove Programs window and the Control Panel.
Open Windows Explorer.
If the Lightroom.exe file is still in the Program Files\Adobe\Adobe Photoshop Lightroom folder, delete it.
If the Lightroom Preferences.agprefs file is still in the Documents and Settings/[username]/Application Data/Adobe/Lightroom/Preferences folder, delete it.
Empty the Recycle Bin.
Try to reinstall. If you cannot, continue with the next two sections in this step:
Move all the folders under the Users/[username]/AppData/Roaming/Adobe/Lightroom folder into a new folder on the desktop; name the folder Lightroom Presets. These are the presets that were installed with the application and that you created.
Move all the folders under the Users/[username]/Pictures/Lightroom/Lightroom Previews.lrdata folder into a new folder on the desktop; name the folder Lightroom Previews. If you have a large number of images, you can move this folder back to its original location before you open Photoshop Lightroom, once it's installed. Or you can delete this folders to re-create it when Photoshop Lightroom opens. If there are further problems with Photoshop Lightroom after it's installed, it might be due to corruption in the previews, in which case you need to delete this folder and re-create it.
Try to reinstall.Important: Do not delete the Lightroom Database.lrdb file!
If there are further problems with Photoshop Lightroom after it's installed, these issues may be due to corruption in the preset files you created, in which case you need to remove them and re-create them, or test each preset individually.
Note: If you can reinstall, and if this is not the first time you opened Photoshop Lightroom, then Photoshop Lightroom will look for a library database file. If it does not find a library in the expected location, it will prompt you to create a new library, locate the library, or exit. Exit will close the dialog box, and Photoshop Lightroom will not open. Although you can tell Photoshop Lightroom to locate your library, it's best to put it back in the default location and then open the application.
If you can reinstall, close Photoshop Lightroom and then copy any presets you created from the Lightroom presets on the desktop back into the Users/[username]/AppData/Roaming/Adobe/Lightroom folder.
If you cannot reinstall, then move the Lightroom Database.lrdb file from the Users/[username]/Pictures/Lightroom folder into a new folder called Lightroom Database File and save this file on the desktop. This is your database, if you previously had Photoshop Lightroom installed.
Reinstall Photoshop Lightroom. If you cannot reinstall, continue with the next task in this document.
3. Log in as Administrator before installingPhotoshopLightroom.
In Windows Vista, you must be logged in with local (that is, machine) Administrator rights to install Photoshop Lightroom. If you don't have administrator rights, contact your system administrator for assistance.
4. Check the CD and CD-ROM drive.
Dust or dirt on a CD can interfere with an installation and prevent the CD-ROM drive from recognizing the CD. Examine the Photoshop Lightroom CD for dirt, dust, or fingerprints. Gently wipe the bottom of the CD from the center outward with a soft, lint-free cloth.
Verify that the CD-ROM drive can read other CDs. If it can't, examine the CD caddy or loading tray for dirt, and clean it with a lint-free cloth. If it still can't read other CDs, contact the CD-ROM drive manufacturer or the computer manufacturer.
5. Install current Windows service packs and other updates.
Updates to the Windows operating system improve its performance and compatibility with applications. You can obtain Windows service packs and other updates from the Microsoft website at www.windowsupdate.com. For assistance installing service packs and other updates, contact Microsoft technical support.
Important: Before you install a system update, check the system requirements for Photoshop Lightroom (and any third-party software or hardware you may use with Photoshop Lightroom ) to ensure compatibility. If the update isn't listed, then contact Adobe or the manufacturer of your third-party software or hardware.
6. InstallPhotoshopLightroomfrom the desktop and use the default installation folder.
Some system components such as device drivers and virus protection utilities can conflict with the Photoshop Lightroom installer and result in an incomplete or failed installation, or they can cause problems when you install to a folder or when you use a path to the default installation folder that contains a special character, such as #. To prevent these conflicts, install Photoshop Lightroom from the desktop, and use the default folder name and path.
If Photoshop Lightroom autoplay displays, click Cancel when you are requested to Select the Language.
Copy the Adobe Photoshop Lightroom folder from the Photoshop Lightroom CD-ROM to the desktop.
Open the Adobe Photoshop Lightroom folder on the desktop.
Double-click the Adobe Photoshop Lightroom.msi file, and follow the on-screen instructions.
7.Re-create thePhotoshopLightroompreferences file.
Re-create the Photoshop Lightroom preferences file to eliminate problems that a damaged preferences file might cause:
Quit Photoshop Lightroom.
Rename the Lightroom Preferences.agprefs file (for example, to Lightroom Preferences.old) in the Users/[username]/AppData/Roaming/Adobe/Lightroom/Preferences folder.
Start Photoshop Lightroom. Photoshop Lightroom creates a new preferences file.
If the problem continues, the preferences file isn't the cause. To restore custom settings, delete the new preferences file and restore the original name of the previous preferences file.
8.Install and run Photoshop Lightroom while no other applications are running.
Some applications may interfere with installing or running Photoshop Lightroom. Virus protection programs are meant to stop viruses from installing on your computer. Before installing or starting Photoshop Lightroom, disable other applications, including virus protection programs and startup items (items that start automatically with Windows).
To disable startup items and non Microsoft services:
Quit all applications.
Choose Start, type msconfig in the Search text box, and press Enter.
Write down all unselected items under the Startup and Services tabs.
Click the General tab, and choose Selective Startup.
Click the Startup tab and select Disable All.
Click the Services tab and select Hide All Microsoft Services.
Select Disable All then re-select FLEXnet Licensing Service. If you are unsure whether an item is essential, then leave it deselected (disabled).
Click Apply, and restart Windows for the changes to take effect.
Note: Upon restart, you'll be notified that the System Configuration utility has made changes to the way that Windows starts up. Click OK. When the System Configuration utility appears, click Cancel.
Right-click icons in the Notification Area and close or disable any startup items that are still active.
9. Install Photoshop Lightroom to a different hard disk after disabling startup items and installing from the hard disk.
Hard disk problems can prevent Photoshop Lightroom from installing correctly. By installing Photoshop Lightroom to a different physical hard disk, you can verify if the original hard disk is preventing installation. First, completely remove Photoshop Lightroom from the hard disk.
To install Photoshop Lightroom to a different hard disk after disabling startup items:
Follow the steps in task 8 above to disable startup items.
If Photoshop Lightroom autoplay displays, click Cancel when you are requested to Select the Language.
Copy the Adobe Photoshop Lightroom folder from the Photoshop Lightroom CD-ROM to the desktop.
Open the Adobe Photoshop Lightroom folder on the desktop.
Double-click the Adobe Photoshop Lightroom.msi file, and follow the on-screen instructions.
Click Change and select a different hard disk in the Change Current Destination Folder window. Click OK, and then follow the on-screen instructions.
Intermediate troubleshooting
If the tasks in the previous section don't solve the problem, try the following intermediate troubleshooting tasks.
10. Install and run Photoshop Lightroom in a new user account.
Create a new user account that has the same permissions as the account that you use when the problem occurs. If the problem doesn't recur, the original user account may be damaged. For instructions on creating a new user account, see To add a new user to the computer in Windows Help or contact your system administrator.
11. Optimize handling of temporary files by Windows Vista.
Windows and applications store working data in temporary (.tmp) files that they create on the hard disk. Excessive or outdated temporary files can interfere with performance of Windows or applications.
Delete temporary files by using the Disk Cleanup utility included with Windows or by using the following instructions. Make sure that at least 1 GB of free space is available on the hard disk to which temporary files are written. To start Disk Cleanup, choose Start > All Programs > Accessories > System Tools > Disk Cleanup. For information about Disk Cleanup, see Windows Help.
To manually delete temporary files:
Note: Windows deletes temporary files when Windows and applications close normally. However, when Windows or an application crashes, temporary files can accumulate on the hard disk. Windows may prevent you from deleting some temporary files as they may be in use. Delete as many temporary files as you possibly can, without deleting the files that are in use.
Quit all applications.
Choose Start and type %tmp% in the Search text box and press Enter.
Delete the contents of this folder.
Note the drive letter where this directory is located.
To ensure that at least 1 GB of free space is available on the hard disk to which temporary files are written:
Choose Start > My Computer.
Select the drive noted in step 4. Right click and select Properties.
Confirm the drive has at least 1 GB of free space.
12. Repair and defragment hard disks.
System errors can occur if hard disks contain damaged sectors or fragmented files. Repair and defragment hard disks, either by using the Error-checking tool and Disk Defragmenter utility included with Windows or by using a third-party disk utility. You should run such utilities on each hard disk or partition. More information about the Error-checking tool and Disk Defragmenter appears below; for more information about a third-party disk utility, refer to the documentation for the utility.
The Error-checking tool repairs bad sectors, lost allocation units and file fragments, cross-linked files, and invalid file names. To access the Error-checking tool, choose Start > Computer, right-click the desired hard disk, and choose Properties from the menu. In the Local Disk Properties dialog box, click the Tools tab, and then click Check Now in the Error-checking area.
Note: To prevent Disk Defragmenter from moving files to bad sectors of a disk, run the Error-checking tool before running Disk Defragmenter.
Disk Defragmenter rearranges the files and free space on your computer so that files are stored in contiguous units and free space is consolidated in one contiguous block. To access the Disk Defragmenter utility, choose Start > All Programs > Accessories > System Tools > Disk Defragmenter.
13. Scan the system for viruses.
Use current anti-virus software to check the system for viruses. Virus infections can damage software and cause system errors. For more information, see the documentation for the anti-virus software.
14. Try to install Photoshop Lightroomon a different computer.
Try to install Photoshop Lightroom on a different computer to determine if the problem is unique to your computer. If the problem is unique to your computer, contact the computer manufacturer; if the problem occurs on multiple computers, contact Adobe Technical Support.
Advanced Troubleshooting
If the tasks in the previous section don't resolve the problem, you may be able to resolve the problem by reinstalling Windows Vista and Photoshop Lightroom, reformatting your hard disk and reinstalling Windows Vista and Photoshop Lightroom, or by determining if hardware is conflicting with Photoshop Lightroom.
Disclaimer: Adobe doesn't support hardware and provides these procedures as a courtesy only. For further assistance, contact the hardware manufacturer or an authorized reseller. If you troubleshoot hardware problems yourself, you may void the warranty for your computer.
Note: Before you remove or rearrange hardware, turn off and disconnect power to the computer and any peripheral devices.
15. Log in using the built-in Administrator account.
The built-in Administrator account has a higher access level to the system than a normal local administrator account. By default the built-in Administrator account is disabled. For information about enabling and logging in to the built-in Administrator account, contact your system administrator. You can also refer to this support document on the Microsoft support website: http://support.microsoft.com/kb/926183/en-us?spid=11737&sid=73.
16. Reformat the hard disk, and reinstall only Windows Vista and Photoshop Lightroom.
Reformat the hard disk, and then install only Windows Vista and Photoshop Lightroom from the original installation media. Reformatting a disk erases all files it contains, so be sure to back up all personal files first. Also make sure that you have all application and system disks.
For instructions on performing a clean installation of Windows Vista, see document 918884, "How to install Windows Vista" on the Microsoft website at http://support.microsoft.com.
Note: Don't install additional software or hardware until you're sure that the problem is resolved. Don't back up the hard disk and restore Windows and Photoshop Lightroom instead of reinstalling them. If the problem is caused by an application or Windows, and either one is restored instead of reinstalled, the problem may recur.
After you reformat the hard disk and reinstall Windows and Photoshop Lightroom, try to re-create the problem:
If the problem no longer occurs, then install other applications one at a time and try to re-create the problem after each installation. If the problem occurs after an installation, then the recently installed application may be the cause.
If the problem occurs when only Windows and Photoshop Lightroom are installed, then the cause may be hardware-related, and you should contact the hardware manufacturer or an authorized reseller for assistance.
17. Check for problems with RAM modules.
Ensure that the RAM modules are installed properly and are not the cause of your problem. Do one or both of the following:
Change the order of the installed modules.
Remove all but the minimum number of modules needed to run Windows and [product], and test to see if the problem persists. If it does, replace the modules you removed and remove the others, testing again to see if the problem recurs. If it doesn't, then one or more of the removed modules are the cause. For assistance, contact the RAM manufacturer.

You've tried Help>Updates from within photoshop cs6?
Or this 8.3 updater
http://swupdl.adobe.com/updates/oobe/aam20/win/PhotoshopCameraRaw7-7.0/8.3.52/setup.zip
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Lightroom 4.2 64-bit does not start. How is 0xc000007b error resolved?

System is Windows 7 Home Premium SP1 build 6701, Intel Core 5-750, 8GB RAM.
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Mylenium

Limitations of Quicktime files (.mov and h.264) in Windows 64-bit.

It was recently brought to my attention (yes, I'm late to the party) that any file that requires the Apple Quicktime process for playback (decoding) is severely limiting my otherwise powerful system. The Quicktime process is a 32-bit process, which limits your editing functionality to 4GB of RAM—even if you have 32GB or more installed!
I'm starting this new thread because the thread on which this was brought to my attention wasn't directly related to these issues.
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Thanks in advance!
=== Systems ===
Desktop              |   Laptop
i7-2600K             |   i7-3630qm
GTX460 (1GB)   |   GTX670mx (3GB)
         Windows 7 64-bit
         16GB RAM

strypesinpost wrote:
...Have you read this yet?
http://blogs.adobe.com/VideoRoad/2012/12/premiere-pro-and-quicktime-an d-nikon-oh-my.html
Just now. Yet, it seems to contradict my own findings. The article says: "In the case of Canon DSLR files, there’s something in the file header. Premiere Pro can recognize that the clips came from a Canon camera, and bypass QuickTime. This enables Premiere Pro to have smooth playback of DSLR files..."
The test I conducted was between files from a Canon 7D in their original format vs. an AVI file I transcoded from those originals using GoPro Studio (formerly Cineform). I load up a project and timeline with the original 7D files and then scrub the heck out of the timeline, back and forth. I have Task Manager open in order to monitor my RAM usage. I simply could not get past roughly 4GB. Once I deleted all the original .MOV files from the project, retaining only the transcoded .AVIs, the project cut like butter. The harder I scrubbed the timeline, the higher my RAM usage soared until it gradually, and gracefully came close to maxing out. Lol. Is there a better test I should run?
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Also, is it possible that the footage from the 7D may not *REQUIRE* Quicktime to decode, but since Quicktime is found on my system, the 7D files default to using it anyway?
I've not tested my GoPro footage so thoroughly, but I believe it's limited in the same way. After a transcode to AVI in GoPro Studio, even 2.7K footage plays slick as a whistle. Not so when I don't transcode.
Further thoughts?

IAS 10g R2 on Windows 32 bit & on 64 bit environment

Hi ,
Can you please confirm whether IAS 10g R2 on Windows 32 bit will work on the 64 bit environment with the same performance?
I’m really wonder why Oracle is not releasing 64 bit windows media pack since now almost all the servers are on 64 bit architecture.
And please confirm whether we can download 64 bit windows media pack from OTN?
Regards,
Noman

This is a WebLogic AS forum, no Oracle AS. If you are using WL let us know, if not and you are using Oracle AS then you should post this question there. Hope it helps....

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Hi Forum,
we currently have the following environment:
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Hi;
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Regards;
Lionel

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CONFIGURE CHANNEL DEVICE TYPE DISK FORMAT '\\backup\PROD\df0_%d_%s_%t';
so the RMAN backup will go the Network Share \\backup\PROD\
Now i am performing Restore of the database on TEST server.
so i copied the backup files from the Network Drive (\\backup\PROD\) to the Local Drive D:\Backups
and Performed catalog of all files in D:\Backups
Now when i perform Restore of datafiles , i could see the file is being restored using the backupset from the shared drive (original location)
and not from the local drive where i copied now and cataloged.
The Network drive from TEST server is accessible
so the restore time taken is very long.
How could i make RMAN to restore from the Local Drive instead of the Network Drive (clear all the old catalog's and register only the files in Local drive)
Regards,
DB

Use "catalog start with 'Local Backup location path'; in you restore script , so that it will fail over to your local backup location.
Thanks,
Venkat

Lightroom 3.2-64 Bit. will not start -It said-opening Catalog:DSC0024.then shuts down

I have downloaded Lightroom 3.2-64 Bit . When i start the software it gives me the message" Lightroom-opening Catalog:DSC0024.JPG.Ircat"
Then a window opens and said " Adobe Photoshop lightroom 64-bit has stoped working. A problem caused this program to stoped working correctely. Windows will close the program and notifiy
you if a solution is available"
I have a Windows 7 - 64bit
Any help getting Lightroom started would be appreciated.

Seems to be the following "classic" LR 3.x problem: http://feedback.photoshop.com/photoshop_family/topics/lightroom_3_4_1_64_bit_doesnt_work
In short: You tried to create a new catalog with the name of an existing JPEG file ("DSC0024.JPG"). Perhaps you wantet to open/import that file and accidentally used the wrong command (create new catalog). Solution: 1) Rename the file. 2) Start LR, let it create the catalog in a folder named as the original file, 3) close LR, 4) delete the newly created folder containing the new catalog, 5) Start LR again - it will probably ask you for your catalog (select the catalog you are really working with). 6) Re-rename your JPEG file again.
Edit: P.S: LR 3.2 is a rather old version. The latest update for 3.x is 3.6 (free of charge), download it here: http://www.adobe.com/support/downloads/product.jsp?product=113&platform=Windows (Note: This bug is not fixed in LR 3.6. It is fixed in LR 4).

[Consolidation-Locked] am I able to use lightroom with windows xp s/p 3?

am I able to use lightroom with windows xp s/p 3?
Message title was edited by: Brett N

Here's the Lightroom 4 minimum specs:
Windows
Intel® Pentium® 4 or AMD Athlon® 64 processor
Microsoft® Windows Vista® with Service Pack 2 or Windows® 7 with Service Pack 1
2GB of RAM
1GB of available hard-disk space
1024x768 display
DVD-ROM drive
Internet connection required for Internet-based services*
Mac OS
Multicore Intel processor with 64-bit support
Mac OS X v10.6.8 or v10.7
2GB of RAM
1GB of available hard-disk space
1024x768 display
DVD-ROM drive
Internet connection required for Internet-based services*

Can I run the Photoshop CC and Lightroom with Windows XP professional as the operating system?

Can I run the Photoshop CC and Lightroom with Windows XP professional as the operating system?

The tech specs for Phtoshop CC and Lightroom indicate Windows 7 with SP 1 is required as a minimum, so XP would not be sufficient to run them. Here's the Photoshop specs:
Windows
Intel® Pentium® 4 or AMD Athlon® 64 processor (2GHz or faster)
Windows 7 with Service Pack 1, Windows 8, or Windows 8.1*
1GB of RAM
2.5GB of available hard-disk space for installation; additional free space required during installation (cannot install on removable flash storage devices)
1024x768 display (1280x800 recommended) with OpenGL® 2.0, 16-bit color, and 512MB of VRAM (1GB recommended)†
Internet connection and registration are necessary for required software activation, membership validation, and access to online services.‡

My Lightroom 5.6 64 bit can't be opened

I have installed Lightroom 5.6 64-bit into my Window 7 Laptop. It couldn't be opened until now. I uninstalled and installed it again. My computer both times say 'The application was unable to start correctly (0xc0000076). Click OK to close the application. What should I do? (I also installed Lightroom mobile and it works fine.)

Hi Prettymermaid,
Please use the below link to download the DLL files.
http://helpx.adobe.com/lightroom/kb/error-unable-start-correctly-0xc00007b/_jcr_content/ma in-pars/procedure/proc_par/step_0/step_par/download/file.res/Lightroom_64-Bit_DLLs.zip
Extract the files and then copy the mscvcr80.dll and mscvcr100.dll in the location C:\Windows\System32. If it gives you a prompt to replace the files please do so.
Navigate to the location C:\Program Files\Adobe\Adobe Photoshop Lightroom 5.6 and launch Lightroom5.exe from there and check if you get the same error or not.
Thanks

Lightroom 4 on Windows 7 32-bit, performance?

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