I have iTunes running on a Windows 10 computer. I always suspect that Apple likes to punish PC users, though I can't prove it. I regularly sync my iPhone 6 using iTunes. All of a sudden I started getting a message that my computer is not authorized (same phone and computer I've been using for several months) - see attachment. When I try to authorize the computer it asks for my password, which has been the same for years. I get a message that my "Apple ID or Password is incorrect". I try making a new password, but it asks for a secondary verification that I don't have. I had a "Recovery Key", but it won't accept that either. Now I'm stuck and don't know how to get back on track. Please help.