I'm an administrator, but when I try to use Task Manager to log off another account (such as the guest account that was left logged-in), I cannot ("Access Denied"). Unlike the processes tab, the Users tab does not contain any UAC icons nor does it self-elevate to perform my action.To work-around, I switched to the Processes tab, clicked 'Show Process from All Users', which elevated (silently, no prompt), then went back to the Users tab to do what I want to do with the now-elevated Task Manager process.

This Bug still happen, please fix it, nothing work in this tab