After playing a (Xvid) video on my laptop my hard drive space is zero. Turns out loads of files like AC3_xxxxxx.wav are dumped to my C:\ root directory (where xxxxx are some seemingly random numbers). The files vary in size from a few kB to hundreds of MBs, and also vary in quantity from, say, 4 to a couple dozen (though I suspect this is only because my drive runs out of space to create more).
I can't find any reference to this problem on the web. Any ideas what this could be, or steps I can take to investigate the cause, would be much appreciated.