This is for those who have had problems with playing HDDVD's on Vista 32bit and Powerdvd v7.3 2911. My problems including hiccups in the video every 10-15 minutes where the video would pause for a few seconds and then replay. I have a e6600 with 8600gts video card. I tried everything and it would not fix the pause problem. I tried one last thing and tried running the exact setup except on Win XP and guess what, it's all fixed. I'm not sure what the problem is but playing it on XP fixed it. HDDVD's now play without any glitches. I guess its a software/driver problem with vista. I'm gonna stick with XP until they fix it.