I had a Hp Pavillion 1tb 8gb ram pc. But wanted to upgrade, So I bought an apevia x dreamer 4 case, 1080 watt power supply ,and a Pny Geforce GTX 650. I transferred and pieced all of it together in the new case. The graphics card I chose has 2 DVI ports. But neither of my monitors use DVI. So I used the DVI to VGA adapter that came with the graphics card. When I boot up the computer it boots up fine but The monitor disconnects from the computer at random times even though my connections are tight. To get the monitor to display anything after this happens I have to restart the whole computer itself.This was my original problem which I have found a solution to. But at one point my brother flipped my power supply switch which made it to where my power switch on my case stopped working. But I got that fixed and when I booted up my PC it said there was a problem starting up windows. When I choose the repair option it returns to the boot screen. And when I choose the start windows normally option it somewhat loaded windows but never made it to the log in screen and then the monitor disconnected once again. As I haven't fixed the problem at this time. Any solutions on this problem.