This article will help you change your TeamViewer password for TeamViewer 12 Host.
1. Toward the bottom right of your taskbar, left-click the up arrow to open your System Tray. Right-click the TeamViewer icon that is located there.
2. Left-click the Options item in the dialog box that opens.
3. Left-click on the Security menu in the dialog box that opens. Change both password fields to 123456 and left-click the OK button at the bottom of the screen. The technician should be able to access your workstation.