Currently when you open Reader for Windows it prompts you to sign in, even if the PDF you opened has no interactive elements. The only workaround for this - and this unneeded and unrequested sign-in pop-up is much complained about on Adobe forums - is a complicated Windows registry edit.

It would be better if users could control whether or not this sign-in prompt with a preferences setting. Alternately, this pop-up could be made to fire only when a user is trying to accomplish something (e.g. signing) that actually requires them to login. Both of these solutions are better than forcing users to always see what is, for the vast majority of Acrobat users (those who just want to read some PDF) an unnecessary and unwanted pop-up.