Hey I have an Acer Aspire M3641 with Windows Vista HOME Premium. It has an E7200 INTEL Core 2 Duo Processor, 4 GB DDR2 Memory, 500 GB SATA Hitachi hard drive, 14 in 1 card reader. Before my computer messed up I had norton 360 and deepfreeze. I had a habit of downloading stuff to see if it would work on my computer and it didn't so I would just TURN it off and it went away. I think that had a lot to do with it failing. When I tried to reinstall windows vista on the hard drive it said type mismatch. I downloaded this Drive Fitness Test from the Hitachi website and did an advanced test on the hard drive it said I had a corrupted boot sector, so I completely erased the hard drive and tried to put the operating system on it and still don't work. I have tried to put another hard drive in it that I know works and put the operating system on it and the computer just shuts off or goes to the blue screen of death. I have tried to put windows xp on it when it gets about halfway through with the installation it goes to the blue screen of death. Also one night I started to disconnect all the wires that went to the 14 in 1 card reader from the mother board to see if maybe their was SOMETHING with that and it still does the same THING now I cant remember where all the wires go. I am starting to think their is nothing wrong with the hard drives but I don't know for sure.I figured it out i removed everything that was not necessary from the motherboard including my battery and c-mos jumper and I was able to put an operating system on it.Thank you for sharing that with us.