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Shutdown on speed
By altering a few registry settings, you can dramatically decrease the amount of time it takes for Windows to shut down. To do this, first open up the registry editor and navigate to
HKEY_CURRENT_USER\Control Panel\Desktop\
Once there, find the value HungAppTimeout and make sure it is set to 5000 (that's the default). Now, in the same folder, look for the value WaitToKillAppTimeout. Set this to 4000 (the default is 20000).
Lastly, navigate to the folder
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\
and change the value WaitToKillServiceTimeout to 4000 as well. Another thing that helps speeding up shutting down is going to Control Panel -> Administrative Tools -> Services and then setting the NVidia Driver Help service to Manual.