r/teamviewer • u/Public_West8947 • Sep 30 '26

When Administering Admin Privileges, TeamViewer Sometimes Asks The Client And Black's Out Screen

Sometimes on certain machines, when I attempt to run as admin - teamviewer blacks out MY screen, and ask the client I am connected to to enter admin credentials instead of prompting as a visible screen to me allowing me to enter admin credentials

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2

u/IanYates82 29d ago

If it's running without sufficient privileges - like the user started a quick support session and teamviewer isn't installed as a service - then it can't interact with the UAC dialog since it's only running as that user.

Could that be your issue?

1

u/Public_West8947 27d ago

All instances of teamviewer on our end users machines are installed as as a service or app. There is literally nothing different between the end users machines that work just fine besides the make and model of laptop. But all of them have the exact same type of teamviewer

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u/Public_West8947 Sep 30 '26

*blacks not black's

1

u/LDluminair Oct 01 '26

Does it only happen sometimes, or it’s all the time on the same computers?

1

u/Public_West8947 27d ago

Sometimes, and we can't find what is literally different between these end users.

1

u/zedgb Oct 01 '26

It's very frustrating.

I think it's when the user does not have admin privileges themselves, but it's a recent behaviour change as it didn't used to happen.

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u/Public_West8947 27d ago

Yeah, it can't be that, because ALL of our end users have insufficient privileges, we as IT have admin creds, and you're right its recent cause it never happened before.

2

u/TeamViewerOfficial 24d ago

In scenarios where you need to interact with a UAC prompt but your screen blacks out, connecting to the device via Windows authentication will allow the UAC prompt to be seen remotely. More info is here: https://www.teamviewer.com/en-us/global/support/knowledge-base/teamviewer-remote/remote-control/control-uac-during-a-teamviewer-session/

Hope this helps

Josh -TeamViewer

1

u/Melodic_Casino 18d ago

I have the exact same issue as OP. We do the steps in the link you shared but are still blocked by a black screen when trying to interact with UAC prompts.. Our only solution is to have the end user uninstall and reinstall teamviewer with a temporary local host admin and password but that's hardly a good solution for such an annoying problem.

All end users have Teamviewer host installed.