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Computer crashes, refuses to restart, will only boot in safe mode error code c000021a

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Hi Good day!! try to repair it using your OS driver btw, what Operating System are you using? reply please and i will assist you step by step.

Posted on Oct 13, 2010

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Http://www.kbalertz.com/156669/troubleshoot-error.aspx

Posted on Oct 13, 2010

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STOP: c000021a {Fatal System Error} 0xc0000034 0x00000000 0x00000000 HELP?!


This is not an easy one to deal with if you don't have some things like a boot disk. The error is most likely caused by something that was installed or restored wrong. The best windows option is to use F8 and select last known good config. Then if it starts you can uninstall any software that you added just before this error..IF you cannot do that then you need to be able to boot to a separated disk and use file utilities to remove any programs that might be causing this.

Jul 20, 2015 | Dell Inspiron Mini 10 Notebook

1 Answer

I have a Asus G73JH Windows 7 64 bit operating system. Frequently it crashes into the blue screen of death and subsequently when i try to restart it. I get the select proper boot option error. Upon fu


press F8 on bootup and select SAFE MODE. try to login and do normal things. if this works then this is probably just a driver or application issue. if SAFE MODE doesn't work, this is probably a hardware issue.
Start your computer in safe mode Microsoft Windows Help

Mar 27, 2014 | ASUS Computers & Internet

1 Answer

C000021A {FATAL ERROR} on Toshiba Satellite L300D


it's more than likely a video card fault, restart the computer and tap f8 to go into safe mode. uninstall your video drivers and restart the computer. it should start up okay now. go to the toshiba website and download the video drivers from there. do not update the drivers via windows update after that.

Aug 02, 2012 | Computers & Internet

1 Answer

I installed geforce 210 into my computer and updated the drivers but now it crashes and refuses to boot my computer what do i do?


Try to boot to safe mode. (Press F8 during start up). Then uninstall the geforce 210 driver. Restart your PC. If the system will start fine w/o the video driver, pretty much you've got a bad video card or it might be a compatibility problem w/ the system board. Other option, try a known good video card so you could easily isolate the problem.

Jan 01, 2011 | SPARKLE Computer GeForce 210 PCI Express...

1 Answer

My computer keeps turning its self off before it gets to the desk top screen.


i think your operating system is crashed or corrupted. try to boot in safe mode. for boot in safe mode press f8 at the time of startup and select safe mode. if your system boots in safe mode. If its a crash of operating system then run chkdsk for c drive and select two options with tick marks. it asks to scan at next time startup. select yes and restart your system. after scan it will fixed.

Jun 16, 2010 | E-Machines eMachines Desktop PC

1 Answer

Compaq Preario V5245eu cant get past scrolling xp window just restarts and doesn'r get anywhere have had a c000021a fatal error warning- help please Rodger


If you attempt to install a piece of hardware or software on your PC computer that is incompatible with your system, you may see a blue screen with a C000021a fatal error warning. The easiest way to recover the Windows operating system from this type of error is to restore your computer to a previously working state.
1.Press the "F8" key on your keyboard when prompted during the boot process.

2.Use the up-and-down arrow keys to highlight the "Last Known Good Configuration" option. Then hit "Enter.
3.Use the up-and-down arrow keys to highlight the operating system version that you wish to boot up to, and then hit "Enter" again. The system will now restart to the last working version of your operating system, which will eliminate the C000021a fatal error.
Hope this helps

Mar 13, 2010 | Computers & Internet

1 Answer

Stop: c000021a {fatal system error}


start in safe mode with command propmpt and type chkdsk /r/f and let the system get scan.

Jan 20, 2010 | Dell Inspiron Notebook

1 Answer

Restarted computer and it will not start successfully. Error message provides options for restarting in 3 safe modes, last know configuration, or normally. Tried all options and each time, Windows screen...


If you have a recovery cd, use that. Set your bios to boot from cd.

Sounds like the hard drive has crashed and you may have to reformat it and reinstall the OS...or change it.

Aug 14, 2009 | ASUS Eee 4G Notebook

2 Answers

Blue Screen c000021a


Next step is remove hard drive and see if it is recognized in another computer. The Hard Drive could just be bad, but you need to rule out the motherboard drive controllers that could also be bad. Also try a known good drive in your system.

Char S.

May 27, 2009 | Dell Vostro 1510 Laptop Computer PC...

1 Answer

My Dell Dimension 4400 running windows XP Home Edition stopped working and displays a blue screen with the following message: STOP: c000021a {Fatal System Error} The windows Login Process system process...


If that is not it reistall and to not loose you files click you partion durring the install and do not format it and click enter then click on leave partion alone

Dec 07, 2008 | Computers & Internet

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