Wait a while, then restart your computer and try again.
Make sure you're signed into the Zune software so that it can verify your account with Zune Marketplace.
Check the Zune service status to see if there are currently any known issues, and follow the links below for more information.
Clear your Internet browser cache, which deletes temporary Internet files from your computer
If you're using Internet Explorer 6, in the browser:
On the Tools menu, click Internet Options. The Internet Options box should open to the General tab.
On the General tab, in the Temporary Internet Files section, click the Delete Files button. This will delete all the files stored in your cache.
Click OK, and then click OK again.
Close the Zune software and then re-start the software.
If you're using Internet Explorer 7, in the browser:
On the Tools menu, click Internet Options. The Internet Options box should open to the General tab.
Under Browsing History, click the Delete button.
In the Delete Browsing History box, click the Delete Files button.
When asked if you're sure you want to delete all temporary Internet files, click Yes.
Click Close, and then OK.
Close the Zune software and then re-start the software.
If you're using Internet Explorer 8, in the browser:
On the Tools menu, click Internet Options. The Internet Options box should open to the General tab.
On the General tab, in the Browsing History section, click the Delete... button. The Delete Browsing History box should open.
Clear all check boxes except Temporary Internet files, then click the Delete button.
Close the Zune software and then re-start the software.
If you're not using Internet Explorer 6, Internet Explorer 7, or Internet Explorer 8, search your browser's Help system for "browser cache" or "temporary Internet files," and then follow the directions for clearing the cache. Once the cache is cleared, close the Zune software and then re-start the software.
What's Going On?
Download Error — C00D12F6
Typically, this error occurs because a communication error with the Zune service is preventing Zune from verifying your media usage rights. This is probably the result of a firewall or proxy on your computer. Also, the Zune server could be down.