I've been using .WMV files for months with no problems.   I updated a graphics driver (only thing that has changed since last attempt) and now WMM no longer recognizes any .wmv file and I cannot import them (circle with a line through it when I attempt to drag it in).   Tried rolling back the driver, that just caused WMM to instantly crash before doing anything else, so I updated the driver again as at least I can open the program.   When I use the manual import, it puts a blank seven second clip there.

Any ideas as to what's going on?

Thanks for any help.