I am experiencing a very weird problem at the moment.
Running Windows Vista for over two months now without any problem I had a crash of Ulead Video Studio 11 yesterday. I am not sure if that is the cause but now all codecs (encoders!) are gone under the VirtualDub videocompression window. Also under VideoStudio I do not see the avi codecs anymore.
Under VirtualDub only 'uncompressed RGB/YCbCr' is showing up. All audiocodecs are still availiable as before.

I reinstalled the latest Klite codec pack, ffdshow,etc. I manually installing latest Xvid codec. All audio/video plays fine, no problems there, but it seems impossible to get the encoders back under VirtualDub or other conversion software.

DLL's seem to be in the right places. I checked the registry under HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\MediaResources\icm
there I do see 9 VIDC.* entries, but they don't show up under software. Is it possible that all VFW codecs have been disabled? If so... how to enable them again under Vista?

I used a little program called InstalledCodec to check what codecs are installed, and everything seems fine there, all codecs are enabled. But why isn't any software seeing those encoders?

Any help/suggestions appreciated...