Hiya

This is a good site to use, but when I've done it, its best to jot down what the settings were initially, in case you need to put them back.

Also, if you're not sure about some of them, do them over a period of time, and use all your normal programs each time, just to see if there is a problem

http://www.blackviper.com/WinXP/servicecfg.htm

Regards

eddie