Hello,
Thank you for your interest in Windows 10.
You may be experiencing problems while attempting to purchase music from the Store on Windows 10 if your Windows 10 device region doesn’t match your Live account region.
You may refer the article below for help on this issue.
Troubleshoot Groove player in Windows 10
https://support.microsoft.com/en-us/kb/3078110
Problems with music purchases due to region mismatch on Windows 10
http://support.xbox.com/en-US/xbox-on-windows/store/problem-purchase-music-region-mismatch-windows-10
Feel free to write us back for any further assistance with Windows, we'll be glad to assist you.