Hi deluscious, there is one more thing you might want to try.

Press the start button at the bottom of the screen and find the word run. Click on that and type msconfig into the box. This will bring up a menu that most things in it you dont want to mess with, but there is one you can. Select the tab that says startup. It should be the last tab to the right on the menu.

You will see a list of programs that start when windows starts. These programs run in the background using up your memory. Almost every time you load a program in your computer these programs put in a file here to start up with windows. Very annoying to me LOL.

What you want to do is uncheck everything except the system stuff, and your antivirus. You should be able to figure out what most of them are from the discription given in the list.

If your not sure of any just leave them.

Here is a link with more info than I can put here. This should help you figure out which ones to leave, and which ones to uncheck.

http://www.netsquirrel.com/msconfig/msconfig_xp.html

I hope this helps