The Prefetch folder contains information regarding the optimal disk layout
of program files so they launch quicker. You may delete all those files,
but XP will rebuild that folder so that your computer runs as efficiently
as possible. After deleting the prefetch files, your computer's performance
will suffer slightly until the prefetch folder is rebuilt. It takes approximately
three computer reboots to properly rebuild the prefetch folder contents.
Windows XP's Built-In Optimization
http://www.extremetech.com/article2/0,3973,1149277,00.asp
--
Carey Frisch
Microsoft MVP
Windows XP Shell/User
--------------------------------------------------------------------------------------------------------
| under all programs I go to run and type in prefetch click
| ok and I get the history of all of my activities and
| space used is it safe to delete these and which ones do I
| not delete. thank you for ur help