3 hours, are you serious. I think you need to figure out what windows software you are using. Also do you have lot of files and folders on your desktop ?
Generally my pc takes 8-9 seconds to shut down! because i randomly close each window of all programs then do shut down doing this way virtual memory of overall systems gets down so it consumes less time to shut down
About 1 minute. Or about 10-15 minutes if I let my automated "backup on shutdown" profiles execute, which I generally do.
take less than 1 mins..if it takes you 2-3mins, something is not right with the pc, it's time to troubleshoot or call the pc doctor
I have built my own custom pc, mine takes around 8 secs to shutdown on average, it does depend on your hardware and software. My specs CPU = Intel core 2 Quad Q8300 @2.5GHz RAM = 4GB GPU = NVIDIA GeForce 9400 GT