Sherlock stumbles over the registry entries used by Adobe. It is a false positive. Nothing the matter with the codecs installed by Adobe. Something else is wrong, but you don't give us much to go on.
Look here, read carefully and follow all included links: Some suggestions
Thanks for the reply, I've been carefully going through the "Mountain" of suggestions, and retrying with the same AVI files, it now seems to work, but I couldn't tell you why !, The AVI's are actually mjpg encoded, I did install an mjpg codec, but initialy that didn't work.
The only problem with spontaneously working software is that it may spontaneously stop working !
For MJPEG CODEC's, MainConcept and Morgan get very high marks around here. After installing any CODEC's, one does need to reboot, for the installation to be active.
Sounds like you've got it going, but if you have any issues with the MJPEG, look to the two listed above.
I have to say I have much much cheaper video editing software that works better
Premiere is a professional level video editor geared primarily towards editing of professional camera formats - DV, DVCPRO HD, HDV, XDCAM EX, etc. Premiere does often stumble with other kinds of video (which is often less than 'professional'). I would encourage you to go ahead and use those other tools if they work better for you.