Windows 10: Security concern and a bit confused

I stumbled upon this Group policy setting that when I Disable the policy, the Admin Username will not be displayed in the UAC prompt when elevated from a Standard user account.
Enumerate administrator accounts on elevation

Meanwhile, I can select and see the Admin account username on the Sign-in screen...

This policy setting is useless then. Please correct me if I am missing something.

:)

 

Security Concern

Received this message and scared the **** out of me. Shut the computer down and called my service provider TWC/Brighthouse. They said this was not them and to report to Microsoft. Has anybody seen this or should i be concerned?

 

Security Concern

All these kind of pop-ups are fake warnings - scams. Never ever call these numbers.

Please read:
PSA: Tech Support Scams Pop-Ups on the Rise

Use the Task Manager to close your browser:

How to Use the New Task Manager in Windows 8 or 10

If you use Edge, see all of
GreginMich's replies here:
http://answers.microsoft.com/en-us/protect/forum/protect_other-protect_scanning/system-error/dcccc74e-fb98-43a8-8579-956692a40982

And see GreginMich's reply here:
http://answers.microsoft.com/en-us/protect/forum/protect_other-protect_scanning/when-opening-edge-i-get-this-this-site-says888-776/8cb72f5e-65b0-4ee7-a6bc-4df5b7dca076?msgId=f02408fd-1803-493d-a8cb-d47ea95a67b6

Clear your temporary internet files and reboot. Do not restore the browser session.

After the reboot, the pop-up should be gone.

If not, follow the steps provided here: Remove Tech Support Scam pop-up (Call For Support Scam)

 

The policy states it only hides the administrator name from the drop down list for runas

 

Well, I have it as Not Configured.
How important is this policy from a security standpoint for a standalone machine?
Do I really need to hide the Admin username on the UAC prompt?

The Username can be shown anyways on the sign-in screen. both for Standard and Admin accounts.

However, my password is long and complex.

 

Its a bit pointless if you can see the name at login

 

I will just leave the Group Policy setting as default meaning Not Configured.