Changing Default Permissions Causes STOP 0xC000021A

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This article was previously published under Q137400

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SYMPTOMS

When you start Microsoft Windows NT the following STOP error message appears:

STOP 0xC000021A {Fatal System Error}
The Windows Logon Process system process terminated
unexpectedly with a status of 0xC0000022 (0x00000000 0x00000000)
The system has been shutdown.

After Windows NT dumps system memory to disk, the computer restarts and the same STOP message reappears.

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The file and directory permissions may have been changed on the system root (%SystemRoot%) directory or its subdirectories. Several combinations of permissions may cause this behavior. For example, if you set file permissions to Read/Execute or Read-only in the system root directory and all its subdirectories, the behavior above occurs.

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RESOLUTION

To correct this behavior:

Install Windows NT to another directory and start the new version of Windows NT.
Reset the file and directory permissions of the original Windows NT %SystemRoot% directory to the following default permissions:

NTFS Partition
--------------

Change for the Everyone Group
Quit the second installation of Windows NT.
Restart the original version of Windows NT.
Remove the second installation of Windows NT.

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