It is really very irritating when Windows 7 or Vista changes the Sleep/Shutdown button into an "Install Updates and Shutdown" button. Here is a solution for this.
Removal of traditional shutdown, restart or hibernate option has puzzled a lot to Windows 8 users. And understanding the concern, Microsoft has added these power options in "Win+X" Menu under Windows 8.1, which we also call "Quick Access Menu."
Windows 8 doesn't allow users to change the sound settings pertaining to system events such as Windows startup, shutdown, logon and logoff through Control Panel. However, a registry tweak can help you customize the sound settings easily.