Sounds like a vendor problem.
I bought my computer about 8 months ago and some problems have been happening off and on since then.
One of the 1st problems I had is that when I'm watching a video(on youtube for example) my sound distorts for a moment, my screen goes black for a few seconds then it recovers with a message saying "Display Driver Nvidia Windows Kernel Mode Driver Version 190.16 stopped responding and has successfully recovered." I then have to reload the page (and sometimes the bug just happens right again) until I can watch the full video without the green screen popping up.
Recently I've also had a problem where my computer just freezes. After a while it has some kind of blue screen message that passes very quickly. I managed to catch a glimpse which said something along the lines of shutting down to save computer from further damage. **STOP 0x (plus a string of numbers) and at the bottom "Beginning memory dump". I didn't have a chance to fully read it before the screen disappeared and my computer restarted.
Just a couple weeks ago I started having a problem where my monitor loses connection to my computer prompting my monitor to say "Signal lost." and my screen to go black, whereas my computer is still running fine. Restarting the monitor doesn't help and I ultimately have to restart my computer.
Anyway, so if anybody can point out whether these are all related or at least isolate 1 cause for 1 error, I'd be amazingly grateful since these errors are very annoying.
I've tried cleaning my disk then running a CheckDisk(CHKDSK) as well as update all my drivers and my window updates.
I'm not sure if this is helpful but my computer is Acer Aspire M5802
Processor is a Intel Core 2 Quad CPU @2.66Ghz
Memory is 8GB DDR2
Video card is NVIDIA Geforce GT 220 (with latest driver which is version 25896WHQL)
I'm running on Windows 7 64-bit
I'm not sure what my power supply is or anything else that isn't listed in dxidag/cpu-z and written on the side of my computer.