Shutdown your system fast

Most of the time windows shutdowns too slow. Heres the way to fasten your shutdown speed.

open regedit and then go to:-

HLocal_machine _user/system/controlset001/control
in the right hand panel you wil finad a DWORD named "wait to kill service time out"
its the last key there.Just double click on it and the change its value to 0 .
the default is 20000.
This will give no waiting time for running processes, and hence will
shutdown/restart your pc in less than 5 secs..

Clean the Prefetch to Improve the system Performance
Clean Your Prefetch to Improve Performance

This is a unique technique for WinXP. We know that it is necessary to scrub registry
and TEMP files for Win9X/ME/2000 periodically.
Prefetch is a new and very useful technique in Windows XP.
However, after using XP some time, the prefetch directory can
get full of junk and obsolete links in the Prefetch catalog, which can slow down your
computer noticeably.
Open C(system drive):/windows/prefetch, delete those junk and obsolete files,
reboot. It is recommended that you do this every month.