Yep, fought this for a while, no posts I found helped much except to point me in the right direction to the friggin' DRM files that are killing me. This might not be the best or cleanest solution but it worked for me.

1. uninstall wmp 11 (control panel, add/remove programs, windows components)
2. uninstall wmp 11 runtime (control panel, add/remove programs)
3. uninstall Microsoft User-Mode Driver Frameworks (control panel, add/remove programs). if the Wudf01000 confirmation box appears click OK and continue
4. Open a command window. Click Start-->Run enter cmd and hit enter.
5. change directories: cd \doc*\all* <--puts you in \Documents and Settings\All Users
6. remove unwanted attributes from the DRM directory: attrib -s -h DRM
7. Open Windows Explorer, navigate to \Documents and Settings\All Users and then delete the DRM directory
8. go to microsoft.com/download and get wmp 10
9. install wmp 10
10. download a song from your service that has the DRM license. Play it. I downloaded one from Napster. This should reindividualize the DRM keys for you. You will now be using IBX 11.0.5497.6285.

If you find a problem after this, the other thing I did that I don't think I really needed to do was run a drm reset program. The one I got was available at Napster. Search support for "reset drm" or the filename dr1009.exe. I ran this between steps 9 and 10.

After all this I can use fairuse4wm as before with no issues.


Oh if you need this to work with wmp 11, I haven't reinstalled to test. I know fairuse4wm worked with my wmp 11 version before. I suspect when I bought my mp3 player and was loading drivers, the best buy program which runs rhapsody updated my IBX. Can't say for sure though and since Napster works with wmp 10 and it's all I need now I'll probably leave it at that.