Windows will not boot after system freeze

I installed Win 7 x64 a few months ago and it worked fine until about a month ago when I started getting random system freezes. There is no order to the freezes; I could be playing a game, or surfing the web, or editing a document, or anything. At first it was not more often than once a week, but as the frequency increased, I tried to diagnose it by closing down various combinations of background programs but to no avail. After the last freeze the disk will no longer boot.

I tried using the Win7 disk to repair the installation, and found an option for diagnosing startup problems but it said there were no errors.

I have another disk with XP installed on it, and was able to copy data from the corrupt Win7 disk, so there is no apparent defect except in its ability to boot.

I've googled around, and my current best guess is that the problem is between my disk and mb chipset. The disk is an Intel SSD G2 and the chipset is nForce 570. Apparently there is some kind of issue between Intel SSDs and nVidia chipsets but I have been able to find absolutely no details as to what specific chipsets are affected, any potential workarounds, what the reported symptoms are (to verify I am having the same problem), things to do to make it less of a problem etc. All I've been able to find is that a conflict (potentially) exists. However, it does fit with the fact pattern of completely random system freezes which are getting progressively worse.

So my question is, what would be the best way to proceed? If I reinstall Windows it will take several days to set up all the settings and redownload lots of stuff (I actually don't have enough space on my backup HDD to save everything), and there's also no garauntee it will fix anything if the problem is in the chipset. Getting a new motherboard, CPU, and RAM would be costly (and also doesn't garauntee a fix). The SSD is still under warranty but all I could get is a replacement, and not a refund. So any advice?