not rly a big issue, but evry say 20 mins while im using my pc, my mouse will jump down the screen n may b click sumthin, so say im on cs;s, ill b going along as normal, n suddenly it will bring up the choose different weapon thing, n the scrosshair will go like to the floor, n its very annoying, also my mouse can start to go rly slow, like start to glitch, n ive tried closing all applications n tasks using taskmanager, ive done virus checks n spyware scans, but nothing. could it just be my pc is really crap, so like its just my pc trying to catch up on what it hasnt done, but i dnt think its tht, coz i dnt lag rly, n its doing stuff i havnt pressed ect. just ne opinions or u lot had this strange prob?