FEW PROBLEMS!!!

[johntywino]

Just upped to latest Firefox (4.something)...On starting, Firefox is my start page but when I try to get to a site NOTHING happens...I can only get on a site by using "most visited".. 2nd. problem... Just been using "disc cleanup". Keep getting "High CPU usage, 93% of at least 1 CPY" Why? is it a problem or should I ignore it ?? Lastly when disc cleanup is finished I can retry it and find that I can still clear the same 117820K of space...Isn't it working or what am I doing wrong?