I've tried reinstalling the OS, so obviously reinstalled the driver's as well.
Downloaded and installed Firefox, installed other apps.
But did not install SP3. So, it seems to be a little better now.
I've completely removed the side panel and the cabinet lies on its side... So, lots of cooling for it....
True thing about the service center guys....
My frnd bought a new system and that idiot at the hardware store, who assembled it, though I told him, managed to put the wrong pins for the Cabinet USB Header... Result... My Pen Drive went to heaven.....