Don't waste your time with WMV files that ask to acquire a licence. They are no doubt porn. And where do they want to send you ... ever heard of diallers or marketers, etc. Those files are not to be trusted.

Some hints:

Movie download issues (click on link)

Go for avi & mpeg for video. WMV can't be trusted. More about the DRM licencing here (yes applies to both wma & wmv): What you should know about WMA Files