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It isn't useable by default on many restricted user account settings, so I'd check that too.
 
Strangely when it first came out of the box the button was disabled, but having installed 10.4.3 it reenabled itself..

Weird :D
 
generik said:
Strangely when it first came out of the box the button was disabled, but having installed 10.4.3 it reenabled itself..

Weird :D

Had you deleted or moved System Profiler?
 
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