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I changed a setting on my Windows 8.1 PC and now the screen has gone black. Ive tried to get into safe mode using F8 / Shift-F8 but it never gives me safe mode.

All the guides on how to get into safe mode just state to do it through windows but as i disabled GPU Scaling on my AMD graphics card the screen is just black. I need to get into safe mode and re-enable GPU Scaling.

I've tried booting from Windows 8.1 disc and used repair PC that didn't work.

Also i tried restoring to an earlier version but that didn't work keeps saying cannot restore.

Really hope i don't have reformat the drive.

Anyone got any advice?

Exoon
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1 Answers1

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Microsoft changed it because they believe that Windows 8 starts so quickly you don't have time to press F8. From: Windows Startup Settings (including safe mode)

There are two ways to get to the Windows Startup Settings screen in Windows 8 :

  • If you're not signed in to Windows, tap or click the power icon Power icon from the sign-in screen, hold Shift, and then tap or click Restart

  • Or, if you're already signed in:

    1. Swipe in from the right edge of the screen, tap Settings, and then tap Change PC settings. (If you're using a mouse, point to the upper-right corner of the screen, move the mouse pointer down, click Settings, and then click Change PC settings.)

    2. Under PC settings, tap or click General.

    3. Under Advanced startup, tap or click Restart now.

    4. On the Choose an option screen, tap or click Troubleshoot.

    5. Tap or click Startup Settings.

    6. Tap or click Restart.

    7. On the Startup Settings screen, choose the startup setting you want.

    8. Sign in to your PC with a user account that has administrator rights.

If all else fails, you may be able to reset your GPU scaling settings by directly accessing the registry from the repair console command prompt.

This forum post suggests that zeroing out a couple of keys may fix your problem. You can use the REG ADD command to accomplish this.

PaulH
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