You may receive any one of the following Stop error
STOP: C0000221 unknown hard
STOP: 0xC0000221 unknown hard error
C:\Winnt\System32\Ntdll.dll (or another specific file or driver)
additional symptom details, see the “More Information” section.
This problem may occur if the file that is described in the
error message is corrupted. The following files are checked for integrity when
Microsoft Windows XP starts:
- All driver files (except those that are loaded by the
system loader to start. the computer)
- All dynamic-link libraries (DLLs), including User, Graphics
Device Interface (GDI), Shell, Kernel, Ntdll, Crtdll, and others.
This problem may occur if you install an inappropriate driver
for your hardware. For example, you receive one of the error messages that are
described in the "Summary" section if you install a MIPS driver on an X86-based computer.
This problem may
occur if an Iomega Zip drive is on the same integrated device electronics (IDE)
cable as the hard disk drive.
The third-party products that this
article discusses are manufactured by companies that are independent of
Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the
performance or reliability of these products.
To resolve this problem, obtain a new copy of the corrupted
file or reinstall Windows XP. If you continue to receive any one of the error
messages that are described in the "Summary" section after you reinstall
Windows XP, a hardware problem or a network problem may exist.
This error message may be displayed in many different
formats, including an error message that is displayed on a blue screen or an
error message that is displayed in a dialog box. The type of format that the
error message is displayed in depends on how much of the operating system was
loaded when the corrupted file was detected.