UAC is activated for the administrator. With Windows 8 everything is okay. After the upgrade to 8.1, the administrator account is denied to access the every partition except the one containing Windows, Users, Program Files, etc.
The message is the same as when a regular user is denied access to whatever folder. It is impossible to see and change ownership and permissions.
Same error for every user belonging to the Administrators group, even a user created for the test after the upgrade.
When we deactivate UAC for the administrator, access is okay. But then we can no longer perform some actions, so UAC is important for us.
- the permissions already grant full access to the Administrators group
- chkdsk reveals no error