Vista/7: "Show processes from all users" failed

Symptom:
1.) when a standard user opens Task Manager and clicks on "Show processes from all users" nothing happens. It look like Task Manager is closing an re-opening but user can see only his processes.
2.) when a standard user opens Task Manager and clicks on "Performance" -> "Resource Monitor" the error: "Requested operation requires elevation" appears.

Solution:
give the user administrator permission(resource monitor can be run under power user).
(from Error: "Requested operation requires elevation" - but UAC is turned off)

Related:
Windows 7 Resource Monitor Not Working (No data shown)