1) disable OR unistall ffdshow.
To uninstall just go to add/remove programs.
To disable go to ffdshow configuration page. You should find ffdshow group somewhere in start menu. If you can't then:
a) find ffdshow.ax file
b) open command line: "start" --> "run.." --> write
cmd
c) write:
C:\WINDOWS\system32\rundll32.exe c:\path to ffdshow\ffdshow.ax,configure
This is for latest Windows, if you have old Windows version, instead of
cmd write
command and instead
system32\rundll32.exe write
system\rundll.exe
In ffdshow configuration window, in "codecs" tab change "decoder" for DivX 5 to "disabled"
2) if after that you still experience problems, uninstall divx 5, get latest version from
www.divx.com page and install again.
[edit]
Before step 2, if step 1 don't work go to Xvid decoder configuration page. Uncheck there all boxes under "fourCC support". Then see if it works