Seemingly random BSODs and freezes

Ran a few tests in Seatools:
Short Drive Self Test: Pass
Short Generic: Pass
Long Generic: In progress, I'll update when it's done. It says ~2 hours.

Took a while to have time to do it (I tried and failed to make a backup- the computer kept crashing during backups, so I gave up since there isn't anything I'd be too upset with losing), but I did get a chance to run the DOS tests. The short one passed, but the long one failed, as per the attached picture. Is there anything I can do to at least temporarily fix that? I've read that SeaTools should be able to fix some problems for supported brands, but mine wasn't supported so all it could do was determine if there was a problem or not. Still not sure if I'll replace the hard drive: since I'll have a replacement soon, it might not be worth the money for a new HD for a secondary computer whose other parts are probably also nearing the end of their lives.

I usually pair the HD diagnostics with Disk Check and it's only when both find unfixable errors that I pronounce a drive dead. Here it's complicated by not having a maker's HD Repair scan for the HD brand so I don't even regard the Seagate scan as confirmed.

I think I would run Partition Wizard Surface Scan on the HD with both boxes checked, just to be sure. Since you're there run their File System check on all partitions to confirm DIsk Check.

If no bad sectors then work through the Troubleshooting Steps for Windows 7.

I'd even consider a Clean Reinstall - Factory OEM Windows 7 to see if that resolves it, if only to a test partition. Follow the steps to get a perfect baseline install, using only the tools and methods given.

I tried partition wizard twice (I didn't see any boxes to check, though? Saying 'surface scan' brought up the test window, and from there the only option I saw was to begin). Each time, it stopped and the computer froze at the same point (75.95% complete). It didn't say there was an error, but the fact that it crashed at the same point each time sort of suggests that somethings wrong, no? I wouldnt be opposed to a clean install, if that could fix it (it'd beat getting a whole new HD haha), but I'd rather go through and see if there are any other thoughts on ways it could potentially be fixed first.

Problem solved! I actually found a copy of hard drive scan tools issued by Sony, which detected and repaired a problem. I also decided to format the hard drive and reinstall windows last week, just to be sure, and haven't had any problems since. Thanks everyone for the help!