I tried official and non official ones, changes codecs for k-lite codec pack 64 bit codecs to Cole2k codec packs... 7.9.1 but somehow 1/2 way through it could stop working.... on vista I have 9-10 files setup and they work beautifully till it is done and shut down. Any ideas what I can do or check.....I tried xvid4psp r 90, 132, 45 and a lot of others incl the official one and 6.01 beta as well.. or is there something in windows 7 64 bit that is causing it??