I've just inherited a Dell 5150 and would like to see if it's usable before I dump any money into it, like more ram, a second HD. Running windows home edition w/sp2. Upon startup the system will get going and get to the log in page, but it will not recognize the mouse (USB). Unable to get any further. I can use the F8 funtion and it seems to be working as it gives me the options and I can move the selections with the arrow keys. I can start to boot in safe mode, but it returns to the log in screen as before. This machine had 2 drives, but one went sour and is gone, so am I right in assuming since I can get to the log in screen that the other one is ok? What should I check next?