Windows Vista unlike the previous versions doesn't have an option to enable or disable hibernation in the Power Options of the Control Panel. Strangely, if you search for hibernation in Control Panel the Turn hibernation on or off option will be found but it will only open the Edit Plan Settings dialog without hibernation available if it is already disabled. Therefore, if you end up with disabled hibernation as I did (probably due to the Hibernation File Cleaner option of the Disk Cleanup tool) the only way to turn it back on is to open a command prompt and run

powercfg -H on

This will make the hibernation reappear in all the shutdown menus and power button combos.

This is nothing new and it has probably been written about hundreds (if not thousands) of times already, but since I’m only encountering the issue every few months or even more seldom, it always slips my mind and I end up wondering what’s wrong.

I’m talking about the fact that any custom identity being used for an application pool in Internet Information Services 6.0 must be a member of the IIS_WPG group which grants it all the necessary privileges. Unfortunately otherwise IIS reports only Service Unavailable when the site gets accessed without any additional information which makes it kind of difficult to determine the cause of the problem.

Hopefully this post will help reminding me of this fact when I need it the next time.