Today I came across the suggestion that emptying the 'Prefetch' folder periodically (in XP) helps speed up start up (and shut down) of the system - by getting rid of long unused prefetch codes.
An ideal (and safe) thing for CCleaner to do?
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kes
Prefetch cleaning is already in CCleaner (see in CCleaner - Windows tab - System - last entry) but is a hotly debated issue.
See here for more info.