Win 7 hangs on startup even in safe mode

melbjer

Honorable
Nov 2, 2012
4
0
10,510
Two days ago Win 7 HP gave me a blue screen with white letters saying something about a major error, then the computer shut down a few seconds later. Earlier that day both Win7 and System Mechanic did updates, so I attempted a system restore to a point before those events, but the restore was not successful due to an unnamed program. I could not find the program it didn't like. The PC worked for about 15 minutes and blue screened again, and this time on reboot it permanently hangs after the windows logo comes in. After the logo disappears, the screen stays black except for the mouse curser, which responds, but there is nothing to click on, just black screen. There was random HD activity, so I let it run for 4 hours just to make sure it wasn't just being slow.

1 It does the same thing when I try booting into safe mode, permanent black screen after logo.
2 The blue screen occurred while printing, but I was printing a lot, may be a coincidence.
3 I unplugged all peripherals, scanner, printer, etc., no help.
4 I booted to the Win 7 installation CD, and tried a system restore, but it reports it finds no restore points, even though there had been numerous points when Windows worked.
5 I booted to the Win 7 CD and tried a Windows Repair. It reports it could not detect a problem, and the boot status report says the OS booted successfully.
6 I have a 2nd hard drive on my PC which has XP installed. That runs fine and while runnung the XP HD, the 1st HD with the Win 7 installation shows up and I can see and use all files on it.

My backup image disc seems to have been lost somehow. It would be painful to reinstall Win 7 and be forced to reinstall every other program. Any help would be greatly appreciated.
 

ulillillia

Distinguished
Jul 10, 2011
551
0
19,010
I wonder if your video card or some other inside-the-case hardware failed. Usually, buggy drivers or a piece of hardware that failed causes the BSoD (Blue Screen of Death) to come up. Given that you're only getting an all-black screen, I suspect it's your video card. Do you have a different video card that you could use to test this? It sounds like Windows is running just fine, but the video card has failed resulting in you being unable to see anything, even with safe mode.
 

melbjer

Honorable
Nov 2, 2012
4
0
10,510
Could this be the case even though the video works on the XP drive and also when booting to the Win 7 CD. I can see possibly if the drivers on the Win 7 installation got corrupted, but the hardware seems to work. I tried to reinstall all the drivers from the MB CD, and had problems getting it to run when booted to the Win 7 CD. Do you have any ideas for that? Thanks.
 

ulillillia

Distinguished
Jul 10, 2011
551
0
19,010
If it works with Windows XP, then it's much more likely a driver issue then. Was your video card working before and this just happened? What video card do you have and what driver version do you have (provided you can get anything on your screen)? I think 335 is the latest version for Nvidia - I don't know what AMD's latest version is. Versions before 331 for Nvidia seem to glitch, especially with a browser.