One other little 'trick' you can try to certainly improve overall performance and also regain quite a bit of user-access to the computer...
It is a general 'fix' available from Micro$haft, and most users find, after applying this 'trick', that there is certainly a general improvement. Plus, there are only a few steps to watch out for when attempting to install the 'fix'...
The 'trick' ?
Remove Windoze XP and install, with a full format, Windoze 2000 Professional.