When I try and launch Firefox, I get this error message A copy of Firefox is already open. Only one copy of Firefox can be open at a time." and have tried all of the trouble shooting tips, can you help?

When I try and launch Firefox, I get this error message >A copy of Firefox is already open. Only one copy of Firefox can be open at a time." and have tried all of the trouble shooting tips, can you help? I thought if I were to completely uninstall and re install it might help, but I cannot seem to find instructions to do this....

See [[Firefox is already running but is not responding]], the image shown in that article is the Windows equivalent of the error message that you are receiving, but the information relates to the Mac.

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I just tried updating to iTunes 10.7 on my pc and when I try to launch it I get this error message-The procedure entry point AVCFPlayerSetDirect3DDevice could not be located in the dynamic library AVFoundationCF.dll. Any Ideas?

I just tried updating to iTunes 10.7 and when I try to launch it I get this error message-The procedure entry point AVCFPlayerSetDirect3DDevice could not be located in the dynamic library AVFoundationCF.dll. Them it tells me to re-install iTunes and the same thing happens again. Any Ideas?

Taken at face value, you're having trouble with an Apple Application Support program file there. (Apple Application Support is where single copies of program files used by multiple different Apple programs are kept.)
Let's try something relatively simple first. Restart the PC. If you're using Vista or 7, now head into your Uninstall a program control panel, select "Apple Application Support" and then click "Repair". If you're using XP, head into your Add or Remove Programs control panel, select "Apple Application Support", click "Change" and then click "Repair".
If no joy after that, try the more rigorous uninstall/reinstall procedure from the following post. (If you've got XP, although the procedure is for Vista and 7, just read "Computer" as "My Computer", read "Uninstall a program control panel" as "Add or Remove programs control panel" and assume the system is 32-bit, and you'll be doing the right things.)
Re: I recently updated to vista service pack 2 and I updated to itunes 10.2.1 and ever

Trying to install CS6 master collection to new computer. Every single time I try to download cs6 it randomly stops at the very end when it's almost finished. I have tried all of the trouble shooting options. What else can I do?

I just recently purchased a new computer. I'm trying to download CS6 Master Collection. I have tried all of the trouble shooting options given on the website. It will start the download fine and then when it's almost completely finished it just stops. What can I do? I have tried several times and this happens every time.

how many browsers should I need to try --- starting my third

HT204003 when I try to launch passbook I get an error message cannot connect to itunes store

When I try to launch Passbook, I get an error message "Cannot connect to iTunes Store"

I get the same error message when I try to launch Passbook. I know my wireless connection is working because I can access the iTunes Store via the Music application as well as the App Store.

HT1926 when i try to install update i get this error message the feature you are trying to use is on a network resource that is unavailable any ideas

every time i try to update itunes i get this error message The feature you are trying to use is on a network resource that is unavailable then asks me to find the folder containing the instalation package ITunes.msi

(1) Download the Windows Installer CleanUp utility installer file (msicuu2.exe) from the following Major Geeks page (use one of the links under the "DOWNLOAD LOCATIONS" thingy on the Major Geeks page):
http://majorgeeks.com/download.php?det=4459
(2) Doubleclick the msicuu2.exe file and follow the prompts to install the Windows Installer CleanUp utility. (If you're on a Windows Vista or Windows 7 system and you get a Code 800A0046 error message when doubleclicking the msicuu2.exe file, try instead right-clicking on the msicuu2.exe file and selecting "Run as administrator".)
(3) In your Start menu click All Programs and then click Windows Install Clean Up. The Windows Installer CleanUp utility window appears, listing software that is currently installed on your computer.
(4) In the list of programs that appears in CleanUp, select any iTunes entries and click "Remove", as per the following screenshot:
(5) Quit out of CleanUp, restart the PC and try another iTunes install. Does it go through properly this time?

When i try to update RAW i get this error message Photoshop Camera Raw 6.7 Update Installation failed. Error Code: U44M1P7 ?

When I try to update camera raw files in CS6 I get the following error message
Photoshop Camera Raw 6.7 Update
Installation failed. Error Code: U44M1P7
What do I do?

Which version of photoshop and operating system are you using?
The reason i ask, even though you wrote cs6, is the camera raw 6.7 update is for photoshop cs5.
Did you try Help>Updates from within photoshop to get the most recent version of camera raw, which is 8.7 for photoshop cs6?

When I try to Launch iTunes, I get an error.

When I try to Launch iTunes, I get an error message "The folder "iTunes" is on a Locked disk or you do not have write permissions for this folder". iTunes had been working OK. I uninstalled, and reinstalled on a different drive. Same result. What do I do?

For general advice see Troubleshooting issues with iTunes for Windows updates.
Start with the section Install missing components which should address your particular error. Otherwise the steps in the second box are a guide to removing everything related to iTunes and then rebuilding it which is often a good starting point unless the symptoms indicate a more specific approach. Review the other boxes and the list of support documents further down page in case one of them applies.
Your library should be unaffected by these steps but there is backup and recovery advice elsewhere in the user tip.
If you've already tried a complete uninstall and reinstall try opening iTunes in safe mode (hold down CTRL+SHIFT) as you start iTunes, then going to Edit > Preferences > Store and turning off Show iTunes in the Cloud purchases. You may find iTunes will now start normally.
tt2

When I try to launch itunes I get an error mesage saying that Apple application support was not found and suggests that I uninstall and re-install it, but that doesn't work

When I try to launch itunes I get an error mesage saying that Apple application support was not found and suggests that I uninstall and re-install it, but that doesn't work

For general advice see Troubleshooting issues with iTunes for Windows updates.
Start with the section Install missing components which should address your particular error. Otherwise the steps in the second box are a guide to removing everything related to iTunes and then rebuilding it which is often a good starting point unless the symptoms indicate a more specific approach. Review the other boxes and the list of support documents further down page in case one of them applies.
Your library should be unaffected by these steps but there is backup and recovery advice elsewhere in the user tip.
If you've already tried a complete uninstall and reinstall try opening iTunes in safe mode (hold down CTRL+SHIFT) as you start iTunes, then going to Edit > Preferences > Store and turning off Show iTunes in the Cloud purchases. You may find iTunes will now start normally.
tt2

When I try to launch terminal, i get an error "You are not authorized to run this applicationThe administrator has set your shell to an illegal value."

When I try to launch terminal, i get an error "You are not authorized to run this applicationThe administrator has set your shell to an illegal value."

If you'd asked a question in your original post it might have solicited more pertinent responses. As it is, you were stating a fact. No one knew whether you considered that fact a problem, or what you were hoping to gain by doing so.
The simple addition of 'can anyone help me fix this so I can run Terminal' would have counted for a lot.
As it is, your solution is likely to require the Terminal, so you're going to need to fix that one way or another. The simplest would be to create a new admin account (System Preferences -> Users & Groups) then log in using that account.
Then try and launch the terminal. If that works the problem is specific to your original account and can likely be fixed via some command-line tweaking. I'd start with:
dscl . read /Users/<username>
(where <username> is the short name of the account having a problem). This will show the records in the directory data for your account, one of which will be UserShell. Chances are that value is invalid, or missing, and can be corrected via:
sudo dscl . -change /Users/<username> UserShell <currentValue> /bin/bash
(where <currentValue) is the current setting for UserShell) which will change the user's shell to /bin/bash (the default).
Of course, you might already know this and already tried, but since you didn't say so in your original post it's worth checking.

When I try to install itunes I get an error message that says "Canot access internet conection \." Can someone please tell me what's wrong? My internet connection is working.

When I try to install itunes I get an error message that says "Cannot access internet connection \." Can someone please tell what this means?
My internet connection is working.

Okay. We'll try a different utility.
(1) Download the Windows Installer CleanUp utility installer file (msicuu2.exe) from the following Major Geeks page (use one of the links under the "DOWNLOAD LOCATIONS" thingy on the Major Geeks page):
http://majorgeeks.com/download.php?det=4459
(2) Doubleclick the msicuu2.exe file and follow the prompts to install the Windows Installer CleanUp utility. (If you're on a Windows Vista or Windows 7 system and you get a Code 800A0046 error message when doubleclicking the msicuu2.exe file, try instead right-clicking on the msicuu2.exe file and selecting "Run as administrator".)
(3) In your Start menu click All Programs and then click Windows Install Clean Up. The Windows Installer CleanUp utility window appears, listing software that is currently installed on your computer.
(4) In the list of programs that appears in CleanUp, select any iTunes entries and click "Remove", as per the following screenshot:
(5) Quit out of CleanUp, restart the PC and try another iTunes install. Does it go through properly this time?

When updating to itune 10.5 I get this error message ,older version of bonjour can not be removed, and older version of apple mobile support cannot be removed, any one know how to fix this.

When updating to itune 10.5 I get this error message ,older version of bonjour can not be removed, and older version of apple mobile support cannot be removed, any one know how to fix this.

1) The older version of Bonjour can not be removed. Contact your technical support group.
Unfortunately, this sort of trouble has gotten more complicated to deal with ever since Microsoft pulled the Windows Installer CleanUp utility from their Download Center on June 25. First we have to find a copy of the utility.
Let's try Googling. (Best not to use Bing, I think.) Look for a working download site for at least version 3.0 of the Windows Installer CleanUp utility. After downloading the utility installer file (msicuu2.exe), scan the file for malware, just in case. (I use the free version of Malwarebytes AntiMalware to do single-file scans for that.)
If the file is clean, to install the utility, doubleclick the msicuu2.exe file you've downloaded.
Now run the utility ("Start > All Programs > Windows Install Clean Up"). In the list of programs that appears in CleanUp, select any Bonjour entries and click "Remove".
Quit out of CleanUp, restart the PC and try installing iTunes again. Does the install go through properly now?
(If you do find a clean download site for the correct version of CleanUp, please don't tell me where it is. Without wishing to sound paranoid (although I grant it does sound paranoid), there is a non-zero chance that posting links to download locations for the utility here at Discussions leads to that download location being shut down.)

When i try to order prints i get an error message saying there is a problem with my network and my network is working

when i try to order prints i get an error message saying there is a problem with my network and my network is working. How can i solve this problem?

Try a different media. I have good luck using Maxell discs.

I can't upload Iphone 5 video or send it in an email. It will play in iTunes but just gives a black screen when I try o email. I get an error message when I try to upload. Any Ideas?? I've already reinstalled OS X

It will play in iTunes but just gives a black screen when I try o email. I get an error message when I try to upload. Any Ideas?? I've already reinstalled OS X

Not sure if this Term is Relevant towards an iPhone but, my iPhone won't Post unless if it's plugged into a Charger.

I cannot open my Yahoo Mail but everything else is OK. When I click Yahoo Mail Icon, I get this error message "Safari Cannot open this page. Safari can not establish secure connection with Yahoo Mail.

I cannot open my Yahoo Mail but everything else is OK. When I click Yahoo Mail Icon, I get this error message "Safari Cannot open this page. Safari can not establish secure connection with Yahoo Mail.

It sounds as though a script on the site, or an advertisement, is not working quite right...
When you have a problem with one particular site, a good "first thing to try" is clearing your Firefox cache and deleting your saved cookies for the site.
(1) Bypass Firefox's Cache
Use Ctrl+Shift+r to reload the page fresh from the server.
(You also can clear Firefox's cache completely using:
orange Firefox button ''or'' Tools menu > Options > Advanced
On the Network mini-tab > Cached Web Content : "Clear Now")
(2) Remove the site's cookies using either of these. Save any pending work first.
While viewing a page on the site:
* right-click and choose View Page Info > Security > "View Cookies"
* Alt+t (open the classic Tools menu) > Page Info > Security > "View Cookies"
Then try reloading the page. Does that help?

When I try and launch Firefox, I get this error message A copy of Firefox is already open. Only one copy of Firefox can be open at a time." and have tried all of the trouble shooting tips, can you help?

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