Still In The Dark...

Well I thought our computer was good to go, but it turns out we are still having problems with it. So it looks as though I am either going to have to break down and take it somewhere or get a new one. I really don't wan't to buy a whole new computer when there is nothing wrong with our Monitor, I just need the PC part of it....anyone have any suggestions?? HELP. I was lucky that Karl left his laptop here at home (sorry honey!), but we really, I guess I really need to have one...