How To Reinstall Teamviewer After It Has Expired ?
1. First uninstall the copy of Teamviewer from your system. This can be done with free uninstallers or by using Window’s default ‘Add or remove‘ program which can be found at: ‘Start’ –> ‘Settings’ –> ‘Control Panel’
2.Click on Start –> Run –> type %appdata% –> delete TeamViewer folder and also delete “C:\\Program Files\\Teamviewer”
3. Delete registry folder: hkcu/software/teamviewer & hklm/software/teamviewer
4.Change MAC by RightClick on MyComputer -> Manage -> Device Manager -> Network Adappters -> Right Click on you NIC , choose Properties -> Advanced -> Click Choose “Network Address” -> Type 12digit in Value box (Ex : 001A3F25454E) -> OK
5.Disable and Enable you NIC in Network Connections . Now your MAC was changed.
***Re setup Teamviewer and Enjoy it now***