I'm hope I'm posting this in the right place and generally doing everything just like I should on this forum. Please don't hurt me if I'm not, though

Let me get to the point. To put it short, my OO doesn't show any dialogue windows. I'm using OO 2.1 on Windows XP. Since recently, I can't Save As (and, consequently, can't save any new documents either), I can't insert pictures, I can't even access printer properties when I want to print. You get the picture. I'm not sure this has got anything to do with it, but also quite recently I'd been battling some malware. I came out victorious (or so it would seem), but if I'm not mistaken, the OO problem more or less concident with the malware thing. If so, it would seem like a Windows problem, right? However, everywhere else in the dialogue windows work just fine, including the very same printer settings window which doesn't want to open in OO. Either way, I'm pretty sure it's not an OO problem per se, because to be on the safe side I redownloaded OO and did a fresh install in a new folder.
I'm pretty baffled but as you can imagine, it's pretty hard to work normally like this and I do in fact _work_ in Open Office. Now, I'd be extremely grateful if anyone had any suggestions on how to fix it which wouldn't include reinstalling XP. Sure, I can do it as a last resort but obviously I'd prefer to try less drastic and time-consuming methods first

Thanks in advance,
Rafal