I even reinstalled it, and checked all the Settings. What was happening is, every time opening TV there was no password visible, and we even tried hovering our cursor in the Password Box as one site suggested.
I tried to get rid of the possibly offending programs but they did not exist in Programs and Features, and ran out of time to use other methods. There was also Citrix, along with the popular LogMe-In that accompanies it. There was another Remote Program on the desktop that had a Business Name (that I won't mention) and did not recognise it. We started by installing a new Teamviewer 12 to a machine that we were not familar with, and believe that they were previously hacked or something, the customer is not quite sure, they are Seniors. We tried to get on a clients machine and could not.
Hey guys, need to fix a teamviewer login problem.