So I just got a new Zune 120 and wow is it awesome. I signed up for the 14-day Zune pass trial and started downloading all kinds of music. I liked it so much I purchased a 1 month Zune pass once my trial expired. After a few days my PC started giving me a C00D12D7 error. Something about my Zune pass being on too many computers (you’re allowed to use it on 3 computers and 3 Zune’s). I was only using my Zune pass on 2 computers and 1 Zune.
I found this forum post with a possible solution. You have to read through most of the post to find the fix that worked for me but here it is:
01-13-2009, 10:56 AM
re: Can’t play or download music with my pass because it’s already on 3 computers?
i did some digging on these and i don’t see any account that has more than the 3 registrations. i am thinking this might be a DRM issue. can you try the following and let me know the results? 1. Close all the programs that are running. 2. Open a Web browser, and then visit the following Web site: http://go.microsoft.com/fwlink?LinkId=105000 3. When you are prompted with a file download dialog box, select Run . 4. Accept the EULA. 5. You will receive the following popup warning message: Reset Windows Media DRM now? WARNING: Licenses for purchased Windows Media content and protected recorded television will be lost. Click Yes . 6. After the tool runs, a Notepad window will appear. Scroll to the bottom of the window and verify that it states: “CleanDRM succeeded.” 7. Open the Zune software, sign in, and then try to play DRM-protected content.
chris program manager, zune support This posting is provided “as-is” with no warranties, and confers no rights
The DRM reset worked for me but I had to run it in safe mode. I hope this helps.