I installed the Lab Management Agent on a demo machine at the same time I was installing the Test Controller and Test Agent; however, it wasn’t on a Server with Hyper-V or with the Hyper-V Data Exchange Service. I received this error after changing the run-as account on the build service to an administrator account (temporarily):
The build service will stop. If this machine is not part of a virtual environment managed by Visual Studio Lab Management, uninstall the following product, if it is installed: Microsoft Visual Studio Lab Agent.
Just one more reminder not to install everything just because you can. I removed it and all is good now. The Lab Agent is for monitoring and provisioning virtual environments, and this was a physical machine.