I recently picked up a gateway e4100 P4 2.8 ghz, 512 mb for 5 bucks!!! system came without a hard drive. I have tried three different hard drives in here and cannot get the system to recognize any of them. I can see them in the bios, but when I put in my win xp cd and get to the install screen, it tells me that it can not find a hard drive on my system. Any Ideas?