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see if this will help,it help me a couple of times..
TO CHECK YE PROTECTED FILES AND REPLACE ANY PROTECTED FILES THAT WERE OVER WRITTEN..
IN WINDOW XP OR 2000 PUT THE WINDOWS INSTALL DISK IN YE CD ROM.
START,RUN,TYPE *( SFC /SCANNOW )* OK
.
scannow sfc (sfc.exe)
Introduction to using scannow sfc (system file checker)
Windows XP has the ability to protect itself from system instability caused by
3rd party software overwriting important system files. This used to be
(and still is in fact), a problem with Windows 95 and Windows 98.
With the introduction of Windows Millennium Edition, Microsoft made a real effort to
stop this from happening. Now in Windows XP we have a much more refined
protection of these important files.... This system is called:
Windows File Protection
By default, Windows File Protection is always enabled and allows Windows
digitally signed files to replace existing files safely. Currently, signed files are distributed
through:
# Windows Service Packs
# Hotfix distributions
# Operating system upgrades
# Windows Update
# Windows Device Manager
If you introduce a file replacement in any other way, Windows File protection
will overwrite your file!
An important part of Windows File Protection is the command line utility:
System File Checker (sfc.exe)
You will often see references to scannow sfc in online newsgroups etc. This is a
great tool for troubleshooting Windows XP problems.
How to use scannow sfc...
The main reason for using this utility is when you suspect there may be a problem with a Windows XP system file.
Perhaps you get a dialog box appear informing you of a problem with a .dll file, or your program will just not load! It is therefore worth checking to see if there are any corrupt system files using scannow sfc.
To do this simply go to the Run box on the Start Menu and type in:
sfc /scannow
This command will immediately initiate the Windows File Protection service to scan all protected files and verify their integrity, replacing any files with which it finds a problem.
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