CS6ServiceManager.exe - System Error

PC running Windows 10:

Today I uninstalled my CS6 suite having now installed the CC suite.  Up to this point, the two were installed concurrently.

However, when I restart Windows 10, I get a series of 3 CS6ServiveManager.exe error messages.  It's as if a piece of the registry was not removed during the uninstall process.

Another curious issue.  When starting Photoshop CC2019, I was prompted to log on to my CC account (for the first time in eons).  When I logged on, I was informed that I had exceeded the number of machines that I could associate with my CC account.  It showed the PC I was logging on with as a new unknown device - pushing me over the limit.  I had to de-register my laptop, as I wasn't using it.

Can anyone please offer any advice?

Message was edited by: Jonty Sexton