I've been routinely converting downloaded AVI files to MPEG-1 VCD format using TMPGEnc 2.5 Plus. Suddenly I'm unable to get the audio portion to work. When loading the file into VirtualDub I'm getting a 0055 audio error. I can go through an elaborate workaround stripping the audio using VirtualDub, renaming as MP3, loading into Nero wave editor and saving as a wave file and then multiplexing the two back together again.

The ironic thing is that I take the same AVI files, put them on my laptop and try to load them into TMPGEnc 2.5 plus they work just fine without any extra conversions. So it's not something particularly screwy with these particular AVI files. My main machine will not handle them (even though it has handled similar files in the past) but my laptop does handle them.

Something has changed on my desktop system that is messing up the way these files are read. The only thing I can figure is a recently installed a program called "aviutil" which must have installed an old buggy MP3 codec of some kind on my main machine however my laptop still has the proper codec. Aviutil did not come with an uninstall a program. I've deleted from the hard drive and search the system registry for any entries related to aviutil and removed them. I've gone into system/device manager/audio codecs/properties in the control panel and try disabling various Codecs to no avail. None of that has helped.

Short of doing a system restore can you think of any way I can get the proper version of the codecs reloaded so that my main machine works like it used to and like my laptop does?