BSOD, BSOD, then DEATH

Quick history - About a month ago I started getting BSODs of the memory management type. Went through memory tests, scoured, screamed, swore and cried a bit checking that everything was as up to date as it could be. Removed a couple of problematic programs and the problem seemed to be cured.
Or so I thought. The computer would still fall out of sleep into what I'm assuming was a bsod reboot. It would be sitting at the login screen. Easy enough to solve shut it down. Whatever computer boots quick enough anyway.
During the process i was looking through the error logs and there appeared to be sata driver related errors happening.

Anyway wake up today, check the usual stuff. No problem. Go to play a game on steam, steam updates, game crashes within 5 mins. Close it down, then winamp gives me an audio driver error and summarily crashes. Go online reinstall audio driver, proceed to carry on with life. Within an hour my computer just takes a major "memory dump" crashing straight to reset no blue screen just black then reboot.

So it reboots i get the windows failed shutdown etc... I choose start normally. This may be where I went wrong but its done so....
Get to the flying window and it sits there pulsating for near 5 minutes or so. I went away for a few. Get back hit reset go into windows repair. it scans for a couple of minutes and then proceeds to show me in the summary that the boot sector is corrupt.
I can't do a system restore because it won't recognize the installation. It doesn't even show up.

Swearing screaming and a pinch of crying ensue.

So now I'm trying to figure out just what to do next. There's just too much not backed up on there to abandon.
I have an old laptop drive in there so i was thinking one option is doing a quick w7 install to rescue what I can.
Or I have previously reinstalled w7 without losing everything but it was in folders that weren't default. (if that makes any sense)
Or just throw it all to the dogs nuke it and reinstall over the original disk.

I have a wd 1tb black corsair 60g accelerator cache ssd.
I keep unused data on an external so it wouldn't be a complete loss just substantial.

Balls. That wasn't what I wanted to hear. Thanks anyway.

Ya there's no overclock on it.
I'm taking this "opportunity" to clean my desk area and build a computer stand.
Is there a way to test the sata ports beyond them failing and not working.
It does seem reasonable that my sata 3 ports may be the issue.