A cramped C drive could definitely add to your troubles...that can slow your operating system down. And I'm not sure how Divx works, but it's possible it puts temporary files of some sort on your C drive, which may be why you got that error.
It's also possible that Divx is just a high demand program that needs lots o' memory and doesn't like your system. I'm not sure.
Have you defragmented your hard drives lately? That might give you a little more speed...every little bit helps!
Rosie, did I ever tell you that yer one funny lady?...
Thanks!
C and D drives 99% unfragmented (thanks to system works)...my E drive is 10 gigs, with only about a gig on it...should I move 'em there yuh think?...