I just installed a new EVGA 500 watt 80 + power supply, when I first booted up my computer I got a blue screen and said it had to restart, after restarted it started up fine but I left it sitting in when I tried to wake it the computer froze and did the same blue screen, the error was kernel page data error or something like that, when it restarted it said reboot and select proper boot device or insert boot media in selected device and press a key.... What's the cause of this? Or how to fix