Good lord, my problems were even worse than I believed!
The thing with Windows Explorer turned out to be a virus- a second run of Spybot found and eliminated it. But then, later, my computer CRASHED! And Windows just wouldn’t turn on!
Fortunately, I was able to start it up on Safe Mode. That way it works fine (hell, it works BETTER than usual- if it had sound I might keep using Safe Mode all the time!) but when I reverted to normal mode, Google Chrome started opening page after after page and I couldn’t stop it! Apparently this is another, new virus, and I’ve tried everything I can, running all my antispyware and even doing a System Restore. It STILL happened! I was forced to remove Chrome from my system. Now I’m getting a window asking for it, which cannot be closed, but if I ignore it I can continue using my computer (as sluggishly as usual).
I’m now using Firefox again, despite even the latest version freezing and closing down on me occasionally. I guess I’m going to have to go back to Internet Explorer. -_- Not to mention that I’m not happy at still having that virus in my PC. Has anybody heard about it, or how it can be removed?

I tried using programs like DriverDetective that look for and install the drivers for you, but wouldn’t you know, you have to pay for the full features (and I do not own a credit card.) Sigh I guess I’ll have to wait until we reformat again. (Btw, that low-level thing sounds risky… if things get THAT bad, I’d rather just get a new harddrive.)