internet music downloads

Hi I recently download some music from Wal-Mart.com and
was playing the files fine now if I play any file from the
internet even in Windows Media player 9.0 I get this
virtual c++ Library runtime error r6025 pure virtual
function and shuts me player down. Also I tried to make a
cd and downloaded the easy cd burner for that roxio and it
still says I need to download it any idea out there I
would really appreciate it alot thanks.