Beth;
I don't have any idea if this will help, but I know it can't hurt.
Start | Run | Type: sfc /scannow | OK
Have your XP CD ready to stick in your CD drive. You may or may not need the XP
CD.
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Description of Windows XP and Windows Server 2003 System File Checker (Sfc.exe)
SUMMARY
This article describes System File Checker (Sfc.exe), which is a command-line
utility used with the
Windows File Protection (WFP) feature.
MORE INFORMATION
System File Checker gives an administrator the ability to scan all protected
files to verify their
versions. If System File Checker discovers that a protected file has been
overwritten, it retrieves the
correct version of the file from the cache folder
(%Systemroot%\System32\Dllcache) or the
Windows installation source files, and then replaces the incorrect file. System
File Checker also
checks and repopulates the cache folder. You must be logged on as an
administrator or as a
member of the Administrators group to run System File Checker. If the cache
folder becomes
damaged or unusable, you can use the sfc /scannow, the sfc /scanonce, or the sfc
/scanboot
commands to repair its contents.
System File Checker Tool Syntax
Sfc [/Scannow] [/Scanonce] [/Scanboot] [/Revert] [/Purgecache] [/Cachesize=x]
/Scannow: Scans all protected system files immediately and replaces incorrect
versions with correct
Microsoft versions. This command may require access to the Windows installation
source files.
/Scanonce: Scans all protected system files one time when you restart your
computer. This
command may require access to the Windows installation source files when you
restart the
computer. The SfcScan DWORD value is set to 2 in the following registry key when
you run this
command:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
/Scanboot: Scans all protected system files every time you start your computer.
This command may
require access to the Windows installation source files every time you start
your computer. The
SfcScan DWORD value is set to 1 in the following registry key when you run this
command:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
/Revert: Returns scan to the default setting (do not scan protected files when
you start the
computer).The default cache size is not reset when you run this command. This
command is
equivalent to the /Enable switch in Windows 2000.
/Purgecache: Purges the file cache and scans all protected system files
immediately. This command
may require access to the Windows installation source files.
/Cachesize=x: Sets the file cache size to x megabytes (MB). The default size of
the cache is 50 MB.
This command requires you to restart the computer, and then run the /purgecache
command to
adjust the size of the on-disk cache. This command sets the SfcQuota DWORD value
to x in the
following registry key:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon