I've been working on this computer for about 2 weeks now. I'm not a computer wiz but I do know how to put computers together. The computer is an old Dell Optiplex GX110 SSF. I know it's old but hey it was free. The problem I'm having is the computer keeps on freezing up. It won't load in windows. I thought maybe the hard drive, I put it in another computer and works fine. Then I thought maybe the motherboard. I bought a working used one and installed it. I was actually able to get windows to boot up and was working fine for a couple of hours. I reformatted the hard drive and reinstalled windows so I could start out fresh. I ended up getting all of that done and reinstalled the drivers needed and desired software. I turned it off and started it up the next day...it froze on startup again. I restarted it and loaded up fine. The next day again I restarted and froze up on startup. I thought maybe a hardware problem. So I disconnected everything except mouse, keyboard, and hard drive. Still froze up. I disconnected the hard drive and the darn thing still freezes up. It will let me go into the bios but as I'm just moving arrows on the keyboard navagating through it freezes. Could it be the processor? Or maybe I got a bad motherboard? I need help and would appreciate any assistance!!