When opening Visual Studio or attempting to profile an application, receive message: "failed to get the session manager service".
This issue is related the DevPartner Control Service not being started.
You can remedy this by going to Control Panel > Administrative Tools > Services and scroll to DevPartner Control Service:
Is the service is started? If not, attempt to start it. If it starts successfully, verify that its 'Startup Type' is set to 'Automatic'.
If the service fails to start, please right click on the service and go to Properties | Dependencies, and verify that 'Remote Procedure Call (RPC)' is listed in the '...depends on...' section?
If RPC is listed, scroll to that service and verify that it is started.