Uninstallation of Teamviewer not possible

Hello,

i´ve tried to uninstall TV14 which was rolled out via msi (script). There was a previous tv-installation (i guess 13) which is causing trouble.

I´m currently unable to uninstall tv via Uninstall/Programs or via msiexec shell. I´m getting error 1603 in uninstallation. When i use graphic interface via Software Teamviewer 14 is listed but cannot be uninstalled (uninstallation is immediately rolled back).

I´ve also tried to delete the software manually - without luck. I´ve deleted the necessary strings in the registry.

What to do?

Kind regards,

Simon-Timothy