Can't boot Windows 8 - Black screen, blinking underscore
I've seen this issue posted everywhere, yet I cannot fix this.
I can access the bios, but nothing after that.
Windows (8) will not boot and I only see a black screen with a blinking underscore.
I am unable to boot from a cd drive or usb either.
CMOS has been reset, and I've tried booting with some drives connected, some not.
60gb Kingston v300 ssd.
(Windows 8 is on here)
500gb Seagate HDD.
The SSD is listed in bios, and I still can't boot when I disconnect it.
I cannot boot a cd under any circumstance.
I have tried booting,
- with hdd disconnected
- with ssd disconnected
- with both disconnected
Boot order is correct too.
I have also tried different sata ports.
Keys to the Problem Can't boot Windows 8 - Black screen, blinking underscore
Manually editing the Windows registry
Manually editing the Windows registry to remove invalid MACHINE_CHECK_EXCEPTION keys is not recommended unless you are PC service professional. Incorrectly editing your registry can stop your PC from functioning and create irreversible damage to your operating system. In fact, one misplaced comma can prevent your PC from booting entirely!
Caution: Unless you an advanced PC user, we DO NOT recommend editing the Windows registry manually. Using Registry Editor incorrectly can cause serious problems that may require you to reinstall Windows. We do not guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk.
To manually repair your Windows registry, first you need to create a backup by exporting a portion of the registry related to MACHINE_CHECK_EXCEPTION (eg. Windows Operating System):
- Click the Start button.
- Type "command" in the search box... DO NOT hit ENTER yet!
- While holding CTRL-Shift on your keyboard, hit ENTER.
- You will be prompted with a permission dialog box.
- Click Yes.
- A black box will open with a blinking cursor.
- Type "regedit" and hit ENTER.
- In the Registry Editor, select the Error 0x9C-related key (eg. Windows Operating System) you want to back up.
- From the File menu, choose Export.
- In the Save In list, select the folder where you want to save the Windows Operating System backup key.
- In the File Name box, type a name for your backup file, such as "Windows Operating System Backup".
- In the Export Range box, be sure that "Selected branch" is selected.
- Click Save.
- The file is then saved with a .reg file extension.
- You now have a backup of your MACHINE_CHECK_EXCEPTION-related registry entry.
Recommended Method to Repair the Problem: Can't boot Windows 8 - Black screen, blinking underscore:
How to Fix Can't boot Windows 8 - Black screen, blinking underscore with SmartPCFixer?
1. Click the button to download SmartPCFixer . Install it on your computer. Open it, and it will scan your system. The junk files will be shown in the list.
2. After the scan is done, you can see the errors and problems which need to be fixed.
3. The Repair part is finished, the speed of your computer will be much higher than before and the errors have been removed. You can also use other functions in SmartPCFixer. Like dll downloading, junk file cleaning and print spooler error repair.
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