Need Computer help

[hooskins]

Ok so it froze up again. What it did this time is the fan in the computer started making a louder noise and when I tried to move the mouse it would not work. Then I tried to get to windows task manager, and the computer gave me that ugly beep when it is pissed off at you for doing something wrong.

I dont know if my memory is overloading because once earlier today it did the same thing but I put the computer on standby, and it would not let me log back in because it said the memory usage was too high or something. And just now before it froze up the PF usage on the Windows task manager wasn't above halfway, so I don't get it.

I totally cleaned the computer so I don't really have anything on it beside my music, documents, AIM, Itunes, antivirus, Mozilla with adblocker-plus. What can I do?