They are too old. Download from here. Tried these, fairly small exes. The VC 2008 redistributable worked, but the actual dll I needed wasn't there. The VC 2005 installer aborts with "error 1723" which is vaguely defined as "missing dll", without specifying which one it needs. So I tried the UUrollup, and that worked 100% and now I can run VirtualDub again.