START UP

[jerry]

My computer came with Win XP installed. I've used it for
over a year with no problems until recently. Now, I can't
even get Windows up, including in Safe Mode or booting
from the CD. I get the following message:

winlogon.exe - Entry point Not Found

The procedure entry point AssocIsDangerous could not be
located in the dynamic link library SHLWAPI.dll

If I click "OK" I then get the following message:

User Interface Failure

The Logon User Interface DLL msgina.dll failed to load.
Contact your system administrator to replace the DLL or
restore the original DLL.

After clicking "OK" all I get is a blank screen from there
on out.

How can I fix this and get Windows XP up?

Thanks!