Originally Posted by
Saintsman
She runs McAffe and uses Lavasoft adware.
My IT section have advised me to uninstall McAffe and reinstall it.
She got the laptop because every time she used my PC 'nothing worked' because I was always downloading things

If she had her own there would be no problems......
.
This sounds
very much like McAfee, specifically McAfee Spam Killer.
There is a known problem that causes it to hog 100% of your resources, usually when you download email using Outlook or Outlook Express.
Next time it happens, Ctrl+Alt+Delete and if you see 98-100% Cpu usage for MSKSrVr.exe McAfee is the problem! (End that program and you should get your computer back).
I've had/have the same problem and found some articles about it:
http://forums.mcafeehelp.com/viewtopic.php?t=80300
Not sure about the best way to resolve it, but I've deleted all the files in
C
Documents and Settings\All Users\Application Data\McAfee\SpamKiller\Users\1\Front
Which seems to have done the trip (albeit a temporary measure)
http://www.file.net/process/msksrvr.exe.html