Q: itunes match. add computer greyed out after selecting add computer

Hi slocko,

I see that you’re trying to add your PC running Windows 10 to iTunes Match, and it seems like you’re unable to confirm the addition of your computer. I have a couple of suggestions for you that may help you troubleshoot this issue. First, make sure that you have  the ability to connect to the iTunes Store. If you are unable to connect to the iTunes Store, then this article can provide some assistance:

If you can’t connect to the iTunes Store - Apple Support

https://support.apple.com/en-us/HT201400

It may be useful for you to restart your computer before you attempt to add the computer to iTunes Match again. If the issue still persists, you may also need to toggle your iCloud Music Library settings using the steps below:

If you still can't see it after the restart:

1. Turn off iCloud Music Library and then turn it back on. 
    
   1. Go to Settings > Music. 
    
   2. Turn off iCloud Music Library.
    
   3. Close Settings.
    
   4. Go to Settings > Music.
    
   5. Turn on iCloud Music Library.
2. Sign out of iTunes and then sign back in.

Get help with iTunes Match - Apple Support

https://support.apple.com/en-us/HT204406

Hope this helps. Thanks for being a part of the Apple Support Communities!