I used PowerDVD7 for months and never had a problem. I installed WinDVD (for enhanced audio) and now I'm getting "Mismatch between disc and player region codes" errors from WinDVD. Using my Reservoir Dogs ISO as an example, AnyDVD shows this: Code: Summary for drive L: (AnyDVD 18.104.22.168) ELBY CLONEDRIVE 1.4 Drive (Hardware) Region: 1 Media is a Blu-Ray disc. Total size: 11414464 sectors (22293 MBytes) Video Blu-ray label: 22519413_RESERVOIR_DOGS Media is not AACS protected. Determined region(s): A Blu-ray disc Region set to A! Blu-ray standard region lock adjusted to Region A! When WinDVD couldn't play this ISO, I checked WinDVD settings and WinDVD was not set to a region. Thinking this was the problem, I set the region to A using 1 of my 5 allowed changes. Reservoir Dogs still will not play in WinDVD because of the same region code mismatch ... even thoug they are both obviously set to A.