I installed Windows 10 through Parallels 11 without enter the product key into the Parallels guide initially because I received an error that the image file could not be found when I did and the Windows install would fail. I read online to just not enter the product key before the install to get around this problem. This worked but now when I go into the windows 10 settings to add the product key, the settings app freezes and I cannot add it. Any help? Thanks a lot.