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Windows 7: STOP: C00021a Fatal System Error

13 Jan 2014   #1
BananaMann

Windows 7
 
 
STOP: C00021a Fatal System Error

I just finished building a computer and I am installing Win 7 HP. Not long before it gets to the partition screen I get a blue screen error with the following details:

STOP: c00021a (Fatal System Error). The initial session process or system process terminated unexpectedly with a status of 0x00000000 (0xc0000221 0x001003a8). The system has been shut down. I tried 2 hard drives, same thing. I have been building for a long time now and this is the first time I ran into this error. What is the likely cause of this error? Thanks!


My System SpecsSystem Spec
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14 Jan 2014   #2
Arc

Microsoft Community Contributor Award Recipient

Microsoft Windows 10 Pro Insider Preview 64-bit
 
 

The most Valuable suggestions about this issue can be obtained from BSOD Index - carrona.org
Quote:
Cause
This error occurs when a user-mode subsystem, such as WinLogon or the Client Server Run-Time Subsystem (CSRSS), has been fatally compromised and security can no longer be guaranteed. In response, the operating system switches to kernel mode. Microsoft Windows cannot run without WinLogon or CSRSS. Therefore, this is one of the few cases where the failure of a user-mode service can shut down the system.
Mismatched system files can also cause this error. This can occur if you have restored your hard disk from a backup. Some backup programs might skip restoring system files that they determine are in use.

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.
My System SpecsSystem Spec
14 Jan 2014   #3
BananaMann

Windows 7
 
 

But it happens on a clean install at the partition screen..?
My System SpecsSystem Spec
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14 Jan 2014   #4
Arc

Microsoft Community Contributor Award Recipient

Microsoft Windows 10 Pro Insider Preview 64-bit
 
 

Quote   Quote: Originally Posted by BananaMann View Post
But it happens on a clean install at the partition screen..?
That is why I am very unsure exactly what may be done.

If the motherboard uses UEFI, you may enter into the setup and set it to legacy BIOS, as a try.
My System SpecsSystem Spec
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