So I had the same issue about Teamviewer Host not starting on one computer and I will say the steps I did to solve it so you can check if it helps to see a path to the real problem. My Network doesn't have a domain, it has a LoadBalance managing IP's I have 3 Dell and 1 Samsung, all notebooks and only 1 Dell had problems (the older one) Teamviewer wouldn't start even after logon, if I double click the icon it would ask a security confirmation and work fine. First I tried the "ServicesPipeTimeout" solution but it didn't help https://community.teamviewer.com/t5/TeamViewer-General/Teamviewer-service-not-startup/td-p/4929 Then I "enabled the interactive mode for the service" and it started to work fine. After reading this post I turned it off again. The interesting fact is that it keeps working fine, so for me the problem is around that base. Now I have the Interactive mode turned off and Teamviewer Host 13 working fine.
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So with no answer to the dilemma I kept searching for anything to help TV 12 work finally for unattended access (which did not work even after the new update). I am grasping at straws at this point with no answers yet from TV, so I happened on a random attempt among many: My solution at least was to go to the Power settings in Control Panel and reset the computer HDD to never shut off even when signed out. 3 hours later I can still access. Now keep in mind this was already set this way on the one pc I access, but went ahead and set it to like 4 hours, saved, it, then set it back in as "never" and so far it is finally working. So before throwing in the towel with TV 12, check this setting and try it. Hopefully this helps some to reolve the glitch in TV 12. Thanks.
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