Multiple programs crash upon starting

[Guest]

I use WINXP Media edition. Recently all of my third-party programs have begun
to "encounter problems and need to be closed" upon startup. This includes
firefox, trillian, filesharing programs, etc. In most cases I can move the
error window and continue to use the program. I've tried every repair I can
think of and it's time to ask for help from better men. Things I've already
tried:

Virus scan (Norton AV 2006)
Ad-aware
XP Repair Pro 2006
All available Windows updates
Uninstalling unneeded programs
System Restore (back to before I encountered problems)
A registry repair program

I'd really hate to wipe the disk and start clean. Can anyone think of any
other solutions?

 

[Guest]

No. Delet partition, repartition and reformat the hard drive. Install
Windows.