How to remove DRM from WMV and WMA?
I got a few methods listed below:

1. Burn and rip
Actually, there is a common free method to remove DRM from WMV and WMA with 2 steps, Step 1 Burn the protected WMV to a DVD or WMA to a CD
Step 2 Rip them off to your computer, then the DRM should be removed from the WMV and WMA files.
But it's not very convenient and may wear out your CR-ROM. And windows media player can only burn and rip the WMV, WMA (or you will need DVD copy and DVD ripper for other formats).

2. Re-record
One of the most common and simple technology is recording the DRM protected WMA and WMV then use an ordinary converter to convert the recorded and unprotected files. Because this technology is easy to realized and easy to support more DRM formats besides protected WMA and WMV it is welcomed by most of the DRM converters like the http://www.undrm.info/remove-DRM-protection/SoundTaxi-Convert-DRM-protected-music-from-Windows-Media-Player-iTunes-Napster-Yahoo-Music-Rhapsody.htm, http://vinasofts.ws/forum/74073-noteburner-v2-16-a.html, etc.
But there are some disadvantages for those programs.
1. The conversion speed won't get much improvement due to the long recording process.
2. Much audio and video quality could be lost during the recording process.

3. Hook
Hook is another new and more complicated technology which can be used to remove the DRM from protected WMA and WMV files. Comparing with recording process, these sorts of programs have much higher conversion speed, but it's hard to make it support some DRM formats with new and lofty encrpytion tachniques.

And as far as I know, Daniusoft was one of its supporters. After giving a test for some free trials I found it is convenient to remove DRM from protected WMV and WMA files with http://www.wmatomp3-converter.com/digital-music-converter.html, and it also supports other formats conversion like AAC, AC3, WAV, M4A, M4b, MP3, etc.

If you know other more efficient methods please feel free to list below.

Look forward to your sharing.

Thx