XP Host: End program Teamviewer Panel (minimized)

[Slack]

We use Teamviewer to remote into unattended power conversion equipment. That equipment has an XP based HMI (Human Machine Interface), upon which is installed Teamviewer 9 Host. It was previously a version 5 host. Rarely, we may want to re-boot this HMI. However with the Teamviewer 9 host installed, the shutdown process is halted by a windows dialog, reporting that 'this program is not responding' etc... the Dialog has the title  "End Program TeamViewer Panel (minimized)".

I do not recall this behavior with the Version 5 Host. I would like stop this, as it is very undesirable behavior.

Any Ideas?

Many thanks