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Old 05-28-2009, 07:21 PM   #1 (permalink)
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Default Help save Laptop -c000021a unknown hard error

Have a Toshiba Satellite M30 laptop....bit old I know but it was reliable at one time in its life...anyhoo....dont know how or when it happened but the poor ol gurl is breathing her last....when I power on, it attempts to boot up, get the Windows XP logo up, then goes right to BSOD with: "c000021a Unknown Hard Error message and that's it."

I don't want to trash this computer, really want to "bring it back from the dead" IF possible. (and if cost effective). So now I come to you guys, the experts....can you HELP ME SAVE this laptop????

I know someone is gonna recommend I reboot with OS disc...I don't have it, so hopefully you know of a way I can get one w/o helping Gates get richer...

other than that, please give me your guidance and I will follow it...again, want to KEEP this laptop.


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Old 05-28-2009, 08:51 PM   #2 (permalink)
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Default Re: Help save Laptop -c000021a unknown hard error
How to troubleshoot specific STOP Errors


Resolving the Problem

Running the kernel debugger is not useful in this situation because the actual error occurred in a user-mode process.

Resolving an error in a user-mode device driver, system service, or third-party application: Because bug check 0xC000021A occurs in a user-mode process, the most common culprits are third-party applications. If the error occurred after the installation of a new or updated device driver, system service, or third-party application, the new software should be removed or disabled. Contact the manufacturer of the software about a possible update.

If the error occurs during system startup, restart your computer, and press F8 at the character-based menu that displays the operating system choices. At the resulting Windows Advanced Options menu, choose the Last Known Good Configuration option. This option is most effective when only one driver or service is added at a time. If this does not resolve the error, try manually removing the offending software. If the system partition is formatted with file allocation table (FAT), use an MS-DOS startup disk to gain access to the computer's hard disk. If the system partition is formatted with NTFS file system, you might be able to use Safe Mode to rename or delete the faulty software. If the faulty software is used as part of the system startup process in Safe Mode, you need to start the computer using the Recovery Console in order to access the file. If a newly installed piece if hardware is suspected, remove it to see if this resolves the issue.

Try running the Emergency Recovery Disk (ERD) and allow the system to repair any errors that it detects.

Resolving a mismatched system file problem: If you have recently restored your hard disk from a backup, check if there is an updated version of the Backup/Restore program available from the manufacturer. Make sure the latest Windows Service Pack is installed.
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