I think I have a bad codec in my pc but I don't what. GSPOT will not report what codecs are installed in my system, it gives a codec load failure while searching for installed codecs. AVIcodec just froze up. Media Player Classic and Radlight Filter Manager will not show up. All the software uses high CPU while searching for installed codecs, so I'm sure that it's just that one bad codec that can't be read. Any ideas on how to fix this problem?

The only software that works is Zoom Player/ I can access the Filter Manager but it's does not show all the codecs like Radlight Filter Manager.

1 - Uninstall all individual codecs (audio and video) in your system with add/remove programs in control pannel.
2 - Uninstall all codec pack you have.
3 - Reinstall only neccesary codecs. (XviD, mpeg2, "maybe" DivX)
4 - If your system don't work fine after it, do a full system reinstall from scratch.

Showshifter says DIVXMPG4 V3 caused it to crash. Can anyone tell me what file name this codec is so I can search and delete? I read that it's Nimo but I've uninstalled Nimo a long time ago.

I uninstalled Divx 5.2 and everthing is back to normal. I can't imagine the latest software can cause this problem, YIKES! I'm very scared what Windows XP SP2 might do then!

Be carefull, perhaps it is not DivX 5.2 the problem, but another codec that interfers with that one.
Now use AVIcodec and see what another codecs you have, and do as I said you in pass 1, 2 and 3.

You're probably right but I think I'll stop my investigation right here. Fortunately Divx 5 is not as popular as Xvid and I can use ffdshow to decode Divx 5, so getting rid of Divx Pro is no loss.