I noticed that I cannot upgrade VMware Tools from 6.0 and 6.5 to 6.7 on Windows Server 2016 VMs that do not have WOW64-SUPPORT installed.
The Tools installer says it cannot access the Windows installer service.
When I add WoW64 to the VM's OS the installer works.
I couldn't find any KBs about that (although about the error message). Any ideas? This is on vSphere 6.7.