Software Deployment

well I would use managed installations if you can install Team View 8 over 7 or if you can give the TV 8 installer commands to remove old versions via switch or arguments.

If you can't then I would probably us the scripting engine with 2 tasks, remove 7 for task 1 and install 8 with task 2. 

What does the documentation for TeamViewer 8 say about upgrades?  Is there an upgrade installer?  Otherwise, I agree with nshah.

Another thought... possible to upgrade TeamViewer by creating a KSCRIPT and push this out to machines.
Please let me know if anyone else has done this before.

I have successfully been deploying Teamviewer msi via the K1000 & K2000 using the below method.  It allows for a complete custom installation.

1. Install Teamviewer 8 & customize it using a test machine.  

(Teamviewer 8 MSI automatically uninstalls all previous versions)

2. Export the registry settings for Teamviewer 8... click Extras\Options\Advanced\Show advanced options\Teamviewer options\Export options to a *.reg file\Export.  Rename the exported registry settings file to "TeamViewer_Settings.reg" (without quotes) as advised in the Teamviewer Deployment guide.

3. Create a install.bat file with the following cmd line .\"TeamViewer.msi" /qn

4. Zip install.bat TeamViewer.msi TeamViewer_Settings.reg into one zip file. I call mine TeamviewerMSI.zip

5. Add zip file as a K1000 managed installation

5b. For "Installation Command" check 'Configure Manually' enter cmd 'install.bat' without quotes

5c. Check "Don't prepend msiexec:"

6. Deploy to a test machine to confirm successful config.

*remember a license key is only required on the technician\helpdesk install not on end user installations*