I have a gateway computer with windows xp. My cpu usage keeps rising high at random times and when i try to open my microsoft word 2000 now, my cpu usage jumps to 100% and my computer wont do anything until i close word. I have tryed antivirus and that has not helped. It is really slowing down my computer!

Try doing a system restore, to a point before this started to happen...

Sometimes an update will fix this. Have you updated your Office software?

http://office.microsoft.com/en-us/do...s/default.aspx

there r some programes u might hv on ur system dat might be d cause or things like trojans downloaded from d internet