Missing track info.

[Take]

When I go to the properties section of a song file from the windows explorer,
the advance info in the summary section is missing a lot of info like artist,
album and genre. This affects every mp3 file I have. Previously these info
were all available. No idea what changes would have caused this because this
is a shared computer.
Here's a screenshot of the window for a clearer view.

http://i227.photobucket.com/albums/dd302/YanagiTakeshi/WindowScreenie.jpg

 

[Take]

Did a lot of google and found a solution already. Just needed to run the
command regsvr32 shmedia.dll. Not sure what causes this though.