Some web site downloaded PDF Complete to my system without my permission. It caused my Acrobat to not funtion properly. (Acrotray prorblems).
Remove it from your programs!
Why would I want a 'freebie' (to be paid for later) to compromise my paid for software?
What I would be even more worried about is a potential virus in such an installation. I would immediately uninstall the freebie and then do a repair on Acrobat. As for as asking us such a question does not make much sense. But you are welcome to vent a bit as you just have. Good luck.
As sort of suggested, I would initiate a virus scan of your system.