I had the same issue. I removed teamviewer then went into C:\Program Files (x86)\ and deleted the teamviewer directory. Click start + run + %appdata% then deleted the teamviewer folder in there. Reinstalled as personal use and I was back up and running. %appdata% is simple a shortcut to: C:\users\"your username"\appdata The appdata folder is hidden by default so you will have to turn on view hidden files to see it.
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