DeAuthorize my Windows Computer
I currently run iTunes 12.6.3.6 (for obvious reasons) on a older Windows 8.1 DeskTop. I'm moving to a new Windows 10 Desktop and can NOT login to my AppleID account to deauthorize my old computer (I have five authorized devices as well), OR authorize my new computer - in both cases getting the dreaded "There was a temporary problem completing your request. An unknown error occurred (-50). "
Help!
iPhone 8, iOS 13