Hi Chaszal,

Windows XP is very stable, much more so than Win98 or 98se.

Some basic things would be the usual sort of once a month things for the average user.

1. My Computer/right click C drive/Properties/Disk Cleanup

2. Start/Control Panel/Network and Internet Connections/Internet Options/Delete Files/check the box 'Delete all offline content'

then Defrag.

I prefer the free 'Diskeeper Lite'

http://www.webattack.com/get/dkeeperlite.shtml

There are other things like paring down the services running that you may be interested in. The following website give good advice on how to do that.
If you stick with the 'Safe" configuration you should be fine.

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

If you can keep it free of malware and do the basic stuff, he shouldn't have any problems.

I'm assuming he is on dialup; is that correct?