Installed a brand new Evga 850G2 power supply and my computer stopped working. I first notice something odd when i got to the regular boot screen to find that it was taking almost two minutes more than usual. Then it gives me map cant be found. After a few looks i tried to see if it worked with the old power supply, but it does the same thing. So i then read up i assume it could be my hard drive. Problem is that it was the one with my OS. To make sure i looked at my bios and low and behold it can sense that the hard drive is there. I then thought maybe the cables were broken so i grabbed a few spares and even then it doesn't work. So i"m just wondering if i have to buy a new drive and OS which is something i really don't want to do.