My guesses in rough order of likelihood...
1) Those "drivers" were possibly DRM shenanigans, installed by so-called "protected" music CDs. Some of these have been known to cause crashes, particularly during ripping. The best bet for this is unfortunately a nuke-pave (wipe the drive and reinstall the OS and applications from scratch). Some of these drivers use rootkits (Sony's old "pulled" one for example) to hide the drivers from user-mode, so there is literally no way to uninstall them safely on a running system. It could also potentially be spyware. You could try running full Spyware scans with
Spybot S&D if you haven't recently.
The "gear" driver is probably somewhat benign. It's part of iTunes and Norton Ghost 9 among other applications. It can cause problems, but nothing like that I don't think. Not sure what the other one is...
2) Bad RAM. Nothing can take a system down quicker than faulty memory.
Download Memtest 86+ and burn it to a disc, boot the computer up to the CD (you may need to change the "Boot Order" in your BIOS to try to boot the CD drive before the Hard Drive). Let the test run through a few passes (4-5) overnight. If you get ANY errors, you probably have bad RAM (or you've overclocked/timed it too tight).
3) Bad Optical drive and/or bad optical drive Cable. These are so absurdly cheap now that I'd probably just replace them if this is even in doubt at all. While you're at it, replace the cable on your hard drive too.
4) Bad hard drive. Check the drive with the utility provided by your drive manufacturer. Seagate and Western Digital both make nice, bootable, CD images that can run tests on their own drives. If you don't happen to have a Seagate or WD drive, the Seagate tool can also do a more generic test on any drive, which is pretty good. Do the Short and Long test versions.
5) Hopefully those things fixed it... However, it is certainly possible that you have a bad board or bad CPU. Prime95 is a great way to torture test the system for stability. If you have a new-fangled dual-core CPU (or even if you don't), the easiest way to run this test is using
Orthos Stress Prime Beta which is pre-set to launch threads per CPU. Run this test for 24hours to ensure stability. If it fails, it could indicate lots of stuff.... However, the most likely candidates are CPU, RAM, or Motherboard (in roughly that order). If your RAM already passed the Memtest86+ passes, then it's probably CPU or board (and if you have to replace one, you probably need to replace both).
This is assuming that your Windows install is clean. If you haven't done the nuke/pave, then instability here could be caused by bad drivers. Also, I see your CPU is listed as AMD Unknown @ 2.1GHz. If you're overclocking, and especially if you're pumping extra voltage into it, it could be starting to fry. Check it for stability, and if it fails, try to dial it back a bit (or back to default for testing purposes).
6) Last, but not least, it could conceivably be a shoddy power supply. These too are cheap, so if you suspect it could be power-related, perhaps just replace it (
this is a very nice low-end one -- I've just purchased 2 of them). If you have a voltage meter and are willing to take the time, you could test the one you have. It might be easier to take it to a local computer shop and ask them to test the PSU to ensure that it is providing the right voltage on the right rails. Also, make sure your computer isn't on the same circuit as the Air Conditioner or anything (you would be surprised -- I've seen it).
All of this stuff is of course assuming you don't have a laptop. If you're on a laptop, you can still run the tools to check on things, but replacing components of course is near impossible (except RAM usually).