Ok, i compared information i have from home and work computers.

home computer: 2.80GHz, and using currently 247 Mb in CPU usage (in programs that MIGHT be closed as they are open ones i am using). At the bottom it says
Processes: 51 CPU Usage 11% Commit Charge: 545M/3669M

on Work computer: 1.70GHz and using currently 326 Mb in CPU usage (in program that MIGHT be closed). At the bottom it says:
Processes: 63 CPU Usage 1% Commit Charge: 925M/1297M

Yet on work computer, it still runs smoothly while on home computer it is totally useless to move the mouse, even to just close a program. Do you still think that CPU is the problem???