Hey guys. I just tried to upgrade my eMachines T6534 512mb (specs below) with two 1G memory upgrades. The memory type I purchased is PC3200 DDR 400 Mhz. I removed the 512mb stick that came with it, put in the 2 matching 1G sticks and started it up. It seemed to be running very well, although there was a slight clicking noise in the tower that I hadn't heard before. I was running avg antivirus scan for roughly 50 mins, stopped it and shut the computer down in order to install a new mouse I'd purchase. Upon restart, CHKDSK popped up in the blue screen and said it had found some corrupted files, which it then removed. Ever since then, startup is extremely slow and I can't use all of my programs. For instance, I can't even do the Microsoft update, as it will fail every time.
I've since removed the upgrade sticks and put the original 512mb back in, and I'm having the same issues. Any ideas?