I run XP at home with no problems. I have found with the newer version of XP you need to restart your system about once a month also. Why I don't know it just makes surfing the internet go faster. Also Dell seems to be a bit slower and not as reliable as HP when running XP. That could be in the model of the computers,because I understand Dell ahs some really good models. I have a mid grade Dell that gives me trouble opening my Family Tree Maker and some photo editing programs.
The websites I have the most trouble opening? History sites.com and SHAPE!!! That is why I restart my computer onec a week. Stops this problem.
Good luck.
GP