How to stop windows from hijacking the shut down button
As an avid user of the Sleep function on their PC's, people have been more than irritated with Windows 7’s habit of changing the Sleep/Shutdown button into an “Install Updates and Shut Down” button whenever there are updates from Windows Update.
After the last time I accidentally clicked this stupid button when I just wanted to enter sleep mode, I decided to look for a solution.
If you’d like to manually create this hack, you can open up regedit.exe using the start menu search box and then browse down to the following key, creating the key if it doesn’t exist.
Add a 32-bit DWORD value called NoAUAsDefaultShutdownOption with a value of 1. No reboot should be necessary.
Now our Sleep button should be back to the way it was, but if you wanted to use the Install Updates and Shut Down option, it’s still available via the shutdown menu: