I got Avidmux to work in Vista !!!! Yeaaaa
I don't know why (cause I really have no idea what I'm doing) I set the video setting to MPEG-4 ASP (Xvid), In Configure, I set it to Constant Bit Rate 8200, Predefined Aspect Ratio NTSC 16:9. In Filters I selected HQ3D.
I set the Audio to MP3 Lame Mono.
Then Format set to AVI
Those settings provided the cleanest video yet without any of the blocks I had been getting.
I dumped all this into a WMM file and will post that for you to see on Youtube. Next I may need to try Viemo......