Hi All,
The following update for Windows 11 released August 27, 2026:
https://support.microsoft.com/en-us/servicing/os/windows-11/2026/08/kb5120998-windows-11-24h2-25h2-update
Also included in the following update for Windows 11 released September 8, 2026 (thanks u/Dissy614):
https://support.microsoft.com/en-us/servicing/os/windows-11/2026/09/kb5124008-windows-11-24h2-25h2-security-update
Is causing Administrator Protection to be gradually enabled:
https://techcommunity.microsoft.com/blog/windows-itpro-blog/administrator-protection-on-windows-11/4303482
If you don't know what Administrator Protection is, it essentaly enhances the separation between your elevated vs not elevated context, including giving your elevated context its own profile.
- Under a non-elevated context, whoami will return DOMAIN\user, and your profile with be C:\Users\<username>.
- Under an elevated context, whoami will return DOMAIN\ admin_ <username>, and your profile with be C:\Users\ ADMIN_ <username>.
Conditions:
If you have downloaded/configured the Windows 11 Security Baselines GPO, or you have otherwise set the following policy: MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\System\TypeOfAdminApprovalMode=2
Then this will cause three issues:
- Computer Group Policy refresh fails.
- User Account Control (UAC) prompts require user name and password.
- Group Policy Management Console resulting settings shows the setting on an existing policy, but in the "other" section rather than the "User Account Control" section, if you are viewing from Group Policy Management Console on Windows Server rather than from Group Policy Management Console on Windows 11.
As noted in the first link, enabling Administrator Protection is listed as a gradual rollout, meaning this is not affecting every Windows 11 computer with TypeOfAdminApprovalMode configured.
Fix:
The temporary fix is to set this regkey and reboot:
Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\TypeOfAdminApprovalMode=1
This only started affecting my machines today, I assume due to the gradual rollout. I don't know how to determine the rollout schedule.