regmon ? google it m8
if you really want to speed a system up do this:
speed hack explorer ( inject a speedhack dll into explorer.exe ONLY! ), 5.5% ( +5 ) anything extra and things that use explorer to send packets have problems ( like msn windows live etc )
make it optional and allow it to be reset to normal on a hotkeypress combination incase the end user ever has problems.
could call it 'symster boost'