When attempting to install Windows ADK 10 or 11 and Add-ons, the following or similar error is seen:
Windows ADK and Add-ons
WinPE 10 or 11
Windows Assessment and Deployment Kit and add-ons require to be installed with an administrator account. UAC (User Account Control) should also be set to 'Never Notify'
Sometimes GPO's will also prevent an administrator account from installing either component.
Install Windows ADK with a local or domain administrator. Ensure UAC is disabled or set to 'Never Notify' for best results. If issues still arise, review setup log files and contact Microsoft support.