How to Repair Computer Errors by Yourself
bsod c000021a [Solved]
Zipporah Mar. 1st, 2015
How to Fix bsod c000021a Error?
Item Info
Error Codes bsod c000021a
Recommended Download bsod c000021a Error Fixer
File version 5.2
Size 4.5MB
Speed Up Your PC Free Performance Scan

bsod c000021a Error? What is Wrong with My Computer?

This error bsod c000021a popped up ater I ran Firefox. Sometimes I also got blue screen error 0x00000106 AGP_ILLEGALLY_REPROGRAMMED. my computer has always been good. what happened?

- Alden Merry

bsod c000021a Error Again? What is Wrong with My Computer?

"bsod c000021a" appears and crashes the active program window.

Computer runs sluggishly and always seems to be ready to crash down

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How to Fix bsod c000021a Error?

Manually editing the Windows registry

Manually editing the Windows registry in order to fix error bsod c000021a is certainly not recommended unless you are PC service professional. Incorrectly editing your registry can easily stop the PC from functioning and also create irreversible damage to your operating system. In fact, a particular misplaced comma can easily prevent the PC from booting entirely!

Caution: Unless you an advanced PC user, we Not recommend editing (blank) Windows registry manually. Using Registry Editor incorrectly can produce serious troubles that might need you to reinstall Windows. We do not promise that troubles resulting from the incorrect use of Registry Editor can be solved. Work with 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.

Scan your computer for viruses. 

Some viruses can cause error bsod c000021a, especially ones that infect the master boot record (MBR) or boot sector.

Important: Make sure your virus scanning software is completely up to date and that it's configured to scan the MBR and boot sector.

Still can't Fix Error bsod c000021a?

1. Click the button to download Error Fixer . Install it on your system.  Open it, and it will perform a scan for your computer. The junk files will be shown in the list.

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2. After the scan is finished, you can see the errors and problems which need to be repaired.

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3. The Repair part is finished, the speed of your computer will be much higher than before and the errors have been fixed. You can also use other functions in this software. Like dll downloading, windows updating and print spooler error repair.

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Tagged: bsod c000021a, How to fix error bsod c000021a

Comments (34)

What People Say: (About bsod c000021a)

Muito útil! Obrigado a todos que criaram este site!

by Everett Nunez Mar.10th

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