You can't do error-checking on Windows XP if your using NTFS. NTFS doesn't need the error-checking done.
Can you update your bios?
Have you tried the following? Complete uninstall Outlook Remove all Spy/AdWare Reboot Make sure all Windows Updates are applied Install Outlook
Use it to be more secure. A huge percentage of attacks at corporations are internal attacks. The basica rule of thumb is to not trust anybody.
Don't forget to defragment your harddrive as well.
Separate names with a comma.