Running Win XP SP3. Have Corel's (Intervideo) WIN DVD 8 installed, and have this as my program of choice in the Folders entry in control panel as the program to always open WMV programs. When I point to a WMV program and pick play or open, I get a message "File xxx is not a valid Win32 Program." and an abort. However, if I launch WinDVD 8, and have the program point to the file, it opens and plays it perfectly every time. Do I have an error in my system somewhere? Thanks in advance for any help.