The same thing happened to me. When I pursued line 6, they eventually “did something on their end”, to quote customer service, and it worked again. It’s not anti virus, it’s something to do with the hand shaking on startup. I tried other DAWs as well. The only solution was a new user account.
Datacommando, I didn’t create a guest account, I created a new user account and just used it for music until they fixed the problem. If reauthorizing your stuff is
all you have to with a project deadline, I think it’s a small price to pay. (I don’t mean to diminish your frustration, I had it too)