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Black Screen After "Other User" Login in Windows 8.1

post #1 of 5
Thread Starter 
I was troubleshooting an issue in which my PC wouldn't wake up from sleep, and found that it was correlated with my overclock. After steadily increasing my clock speed from stock, I found that anything over 4 GHz causes this issue. I therefore went back into the BIOS, changed clock to 4 GHz, and started Windows again. After the circling icon finished, I saw my normal "boot wallpaper" for a split second and then it switched to the default Windows "rainbow arcs" wallpaper. After pressing any key, instead of taking me to my normal login screen, it takes me to a screen that says "Other user". I am able to enter my normal user name and password; however, I then get a black screen with a cursor. The only thing that works afterward is Ctrl Alt Delete, but if I then try to bring up the task manager it goes back to the black screen. Similarly I get no response for "Win+R".

For both the "Other User" and black screen issues, googling suggested that I boot into safe mode and change some settings. However, I can't figure out how to get into safe mode. I tried clicking the power button from the login screen and then shift-clicking restart, but then it says "shutting down" for a second and goes back to the black screen. Presumably the advanced boot menu is coming up but I can't see anything. I tried resetting the BIOS to stock settings but it didn't help.

Is there anything I can do to troubleshoot other than refreshing the installation from the boot disk and losing days to program reinstallation?

Edit: Forced Windows to give me an advanced boot menu by setting the BIOS storage configuration to IDE, allowing it to crash on startup twice, and then switching back to AHCI which triggered the automatic boot repair. I selected "safe mode" from the advanced boot menu but it just took me straight to the black screen with cursor. Anyone have any suggestions? It could be an AMD driver bug. Is there any way to uninstall it? I tried all 3 available restore points and they didn't help.
Edited by Danja - 10/24/14 at 2:21am
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Monolith
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post #2 of 5
Quote:
Originally Posted by Danja View Post

I was troubleshooting an issue in which my PC wouldn't wake up from sleep, and found that it was correlated with my overclock. After steadily increasing my clock speed from stock, I found that anything over 4 GHz causes this issue. I therefore went back into the BIOS, changed clock to 4 GHz, and started Windows again. After the circling icon finished, I saw my normal "boot wallpaper" for a split second and then it switched to the default Windows "rainbow arcs" wallpaper. After pressing any key, instead of taking me to my normal login screen, it takes me to a screen that says "Other user". I am able to enter my normal user name and password; however, I then get a black screen with a cursor. The only thing that works afterward is Ctrl Alt Delete, but if I then try to bring up the task manager it goes back to the black screen. Similarly I get no response for "Win+R".

For both the "Other User" and black screen issues, googling suggested that I boot into safe mode and change some settings. However, I can't figure out how to get into safe mode. I tried clicking the power button from the login screen and then shift-clicking restart, but then it says "shutting down" for a second and goes back to the black screen. Presumably the advanced boot menu is coming up but I can't see anything. I tried resetting the BIOS to stock settings but it didn't help.

Is there anything I can do to troubleshoot other than refreshing the installation from the boot disk and losing days to program reinstallation?

Edit: Forced Windows to give me an advanced boot menu by setting the BIOS storage configuration to IDE, allowing it to crash on startup twice, and then switching back to AHCI which triggered the automatic boot repair. I selected "safe mode" from the advanced boot menu but it just took me straight to the black screen with cursor. Anyone have any suggestions? It could be an AMD driver bug. Is there any way to uninstall it? I tried all 3 available restore points and they didn't help.

If you reset your pc 2 times while windows is loading it will take you to troubleshooting.
From there you can go to advanced startup options to restart your rig in safe mode.
post #3 of 5
Thread Starter 
Quote:
Originally Posted by MojoW View Post

If you reset your pc 2 times while windows is loading it will take you to troubleshooting.
From there you can go to advanced startup options to restart your rig in safe mode.

Was that a simul-post with my edit? If so, perfect timing biggrin.gif. Unfortunately I still get the black screen even in safe mode.
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Monolith
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post #4 of 5
Quote:
Originally Posted by Danja View Post

Was that a simul-post with my edit? If so, perfect timing biggrin.gif. Unfortunately I still get the black screen even in safe mode.

You can try a windows repair from automatic boot repair but if that doesn't do it you can only refresh the installation from the boot disk.
post #5 of 5
Thread Starter 
Yeah, that was one of the first things I tried. I really don't want to do a refresh though; it'll take weeks to get my PC back in shape. I have an uneducated suspicion that for some reason AMD's drivers are not compatible with the "Other users" menu. Is there any way to uninstall AMD's drivers from the command prompt? Alternatively people talk about fixing the Other Users issue by running netplwiz or regedit from the run menu; is there any way to perform the same function from CMD?

Edit: I thought that if I booted into the startup repair and launched command prompt I'd have access to my C drive, since it asks for my login information. However, it looks like it just sets up a virtual X drive and is blind to everything else. It looks like I'm screwed frown.gif
Edited by Danja - 10/24/14 at 3:06am
Monolith
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Monolith
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