Windows 7 shows black screen after running in bootcamp, iMac early 2008

Help! I installed Windows 7 on my early iMac 2008 using Bootcamp, with all the proper updates etc.
Now it shows a black screen (hard drive still running) after 10 or so minutes of running applications such as Firefox, Mail. Does not seem to happen when there is no activity - screensaver can run for over an hour with no black screen.
All i can do is emergency reboot, only for it to happen again.
Any ideas?

That happened to me and I had to the my Mac to the Apple Store. It took the tech more than two hours to do the install using a thumb drive (which I had to buy) to download the workaround. I don't have the details, but he found the workaround online by searching Bootcamp and black screen. If you have access to an Apple Store and Genius Bar try that.

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My Macbook Pro has a black screen when running in Bootcamp Windows 7. Since I updated the mac side my windows side now starts up with completely black screen - no prompt, nothing, Cap keys still light up as does mouse and DVD drive seems to run.

My Macbook Pro has a black screen when running in Bootcamp Windows 7. Since I updated the mac side my windows side now starts up with completely black screen - no prompt, nothing, Cap keys still light up as does mouse and DVD drive seems to run.
Will not show up in safe mode, will not show when started from Windows 7 DVD.
I suspect the Mac update wiped out my PC video drivers but can not think of a way to re-install?
Can see the PC volume from Mac side with files.
I've looked at all the online solutions so far and have tried most of them without success. Please help!
Specs:
2009 Macbook Pro, 3.06 GHz Intel 2 core, Max 10.6.8.
Model Name:          MacBook Pro
Model Identifier:          MacBookPro5,2
Processor Name:          Intel Core 2 Duo
Processor Speed:          3.06 GHz
Number Of Processors:          1
Total Number Of Cores:          2
L2 Cache:          6 MB
Memory:          4 GB
Bus Speed:          1.07 GHz
Boot ROM Version:          MBP52.008E.B05
SMC Version (system):          1.42f4
Serial Number (system):          7302300GANE
Hardware UUID:          B2D4B4B4-CD92-5C7A-BDC2-527D30DD8DF3
Sudden Motion Sensor:
State:          Enabled

EDIT: RESOLVED
For anyone else who finds their way here like I did, this link did it for me: https://forums.geforce.com/default/topic/527599/windows-8-issues-solved-please-r ead-if-you-39-re-having-black-screen-and-or-flickering-/
Specifically, the posts by Dunsany and valkyr did the trick. I booted in safe mode, uninstalled and deleted the Nvidia driver, disabled automatic driver installation, and restarted normally. I then manually downloaded and installed the previous Nvidia driver for my graphics card (which at the time of this writing was 335.23, rather than the latest which was 337.88), and everything is now bueno!
Two hiccoughs along the way: First, when I tried to uninstall the Nvidia driver the first time, when I restarted I got the login screen (which was a good sign), but it quickly went black again. I powered down, restarted in safe mode again, and repeated the uninstallation process, and it worked the second time. Second, when I started the manual install of the 335.23 driver, the computer played a sound similar to the one for disconnecting a USB device, and the screen went black. I'd seen a lot about trying to increase the brightness (though it hadn't worked up to this point; but if you haven't tried it yet, might as well); I tried it, and it worked! So far I'm back up and running. [/fingers crossed]
Hope this helps someone else!

WINDOWS 8 BLACK SCREEN AFTER LOGIN PROBLEM

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my desktop is hp pavilion a5055d my os is windows 8 i dont know what the problem
i have a ati radeon xpress 1100 for videocard ..
I tried to restart many times.

Hi,
Did this issue occur before?
Try to logon with Safe Mode to see if the same issue occurs.
Furthermore, you can try to update BIOS for your machine?
You can refer these article to update BIOS if your machine cannot boot:
http://www.ehow.com/how_7356859_update-bios-windows-won_t-boot.html
http://www.wikihow.com/Fix-a-PC-Which-Won't-Boot
Hope that helps.
Leo Huang
TechNet Community Support

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I am attempting to install windows 7 on my mid 2007 core 2 extreme iMac. I open bootcamp and do all of the steps except the usb flash drive drivers from apple because the server always fails to load. After restarting, I install windows 7 to the bootcamp partition, and the screen goes black during the "Completing Installation." I wait about an hour before shutting down and rebooting into my Mac partition. I use paragon ntfs for mac and go to the drivers folder and delete the atikmdag.sys file and restart. Booting into the windows partition, I get the error that says "Windows installation has failed because the system unexpectedly restarted. Click ok to restart and redo installation" or something along those lines. Instead of pressing ok, I press shift+f10 and open regedit. After opening regedit, I go into some registry file for the setup (I don't remember where this is located, although I can find it if needed), and I change a value from 3 to 1. After doing this and restarting, It boots regularly with a super low res screen but it boots without problem. I go to the apple website and download the appropriate bootcamp support software and install on my windows partition. After restarting, the screen is black again. I assume this is another video driver problem again because the black screen seems to always be video driver problems; however, its odd that the bootcamp support software would give me an incorrect video driver as it is directly from apple. Would this be the problem or does anyone know a fix? Any help is appreciated.
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If you bought your RAM at a place that also sells PC RAM you may have gotten mislabelled RAM. PCs can handle different RAM speeds so they’ll often label higher speed RAM as a lower speed rather than make two different speeds of RAM. But Macs are much more picky. They require a RAM stick to be exactly 667mhz not 675mhz or 800mhz. The way to tell is to put one of your old RAM sticks in and it will force the new RAM to run at the correct speed.
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Reinstall your video driver
Right-click the taskbar, and then click Start Task Manager.
Click the Processes tab, click explorer.exe,
and then click End Process.
Click File, and then click New
Task (Run).
In the Open text box, enter explorer.exe,
and then click OK.
Click the Start button ,
enter device manager in the search box, and then, in the search results, click Device
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Note
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Click the Processes tab, click explorer.exe,
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you're prompted for an administrator password or confirmation, type the password or provide confirmation.
Choose a restore point when your PC worked as expected, click Next, and then click Finish.
Restart your computer normally.
Arnav Sharma | http://arnavsharma.net/ Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading
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Hello,
The Windows Desktop Perfmon and Diagnostic tools forum is to discuss performance monitor (perfmon), resource monitor (resmon), and task manager, focusing on HOW-TO, Errors/Problems, and usage scenarios.
As the question is off topic here, I am moving it to the
Where is the Forum... forum.
Karl
When you see answers and helpful posts, please click Vote As Helpful, Propose As Answer, and/or Mark As Answer.
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Windows 7 shows black screen after running in bootcamp, iMac early 2008

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