How to fix corrupt codec database?

[digicube]

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.

[deckard8]

Download trial of Showshifter. When run, it will automatically scan for bad/conflicting codecs and disable them. This is the only tool I know that can do this - and it works!. It's got me 'out of jail' on numerous occasions.

[digicube]

It says DIVXMPG4 V3 caused the 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.