back up license error

[Guest]

help! i have lots of wma in my hard drive and it i cant
play it any more. they said that my back up license is
not valid. is there a way i can erase all the license on
my music and back it all up again? please help! tnx!

 

[Guest]

Don't use anymore wma.
Use vorbis from http://www.vorbis.com