DOCUMENT:Q101096  04-MAR-1994  [W_NT]
TITLE   :Err Msg: STOP: C0000221 Unknown Hard Error
PRODUCT :Windows NT
PROD/VER:3.10
OPER/SYS:WINDOWS
KEYWORDS:

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The information in this article applies to:

 - Microsoft Windows NT operating system version 3.1
 - Microsoft Windows NT Advanced Server version 3.1
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The following STOP message appears when a critical system file or other
file needed to load Windows NT is corrupted:

   STOP: C0000221 unknown hard error
   <path>\<file name>

This error can appear in many different formats, ranging from a blue
system error screen to a dialog box. The type of format depends on how
much of the operating system was loaded when the corrupted file was
detected.

If you receive this error message, the file listed along with the
error is corrupted. You need to either obtain a new copy of the file
or reinstall Windows NT. If reinstallation fails to solve the problem,
then a hardware or network problem may exist.

The files that are checked for integrity as Windows NT starts are:

 - All drivers (except those loaded by the system loader to boot
   the system)
 - All dynamic link libraries (DLLs), including USER, GDI, SHELL,
   KERNEL, NTDLL, CRTDLL, etc.
 - All DLLs loaded into the address space of the Windows NT
   server (video drivers, printer drivers, etc.)

This error message can be caused when you install an inappropriate driver
for your hardware. For example, this error would appear if you installed a
MIPS driver on an X86-based computer.

Additional reference words: 3.10 checksum
KBCategory:
KBSubCategory: STPSCRN

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