This should not be a reason to reload XP. There is a lot of info in Google,
search for "XP prefetch not working".
http://www.google.com/search?hl=en&q=xp+prefetch+not+working&btnG=Google+Search
The following is from
http://members.rushmore.com/~jsky/id14.html
Repairing the Prefetch Folder:
4 easy steps how you can rebuild the "layout.ini" file again.
1. Make sure that the task scheduler is enabled. If you are un-sure, go to
Start/Control Panel/Administrative Tools/ Click on Services/ Then in the
list of services make sure the Task Scheduler is enabled & restart the
service by clicking on Start. Close the Services Folder & go back to
desktop.
2. Then go to START/RUN/ and TYPE IN "cmd" (without the quotes) CLICK OK.
This will bring up the DOS Command screen.
3. You will need to copy and paste this entry in at the flashing cursor
" rundll32.exe advapi32.dll,ProcessIdleTasks "(without quotes) and press
ENTER.
4. Now reboot three times and your Prefetch folder will be rebuilt. (It
takes 3 reboots for the prefetch folder to work out what it needs.
Hope this helps.............
Heirloom, old and need a nap