GCPW will always run using the system level Chrome installation but needs a minimum version of Chrome in order to run properly. We should add checks in GCPW to prevent GCPW from running or installing while an unsupported system level install of Chrome is present. 

This can be achieved with a minimum version string in GCPW code that checks the System install version of Chrome. 

Ideally:
1. If GCPW is not yet installed and the Chrome version is unsupported a message pops up stating that the install cannot be completed.
2. If GCPW is already installed and Chrome version is unsupported (either through rollback, version pinning or manual install) then the GCPW button should not appear in the winlogon screen. If disabling the button is not possible then we should at least show a message when the button is clicked stating that the version is not supported.