How to Enable or Disable the Startup Sound in Vista and Windows 7
Information
This tutorial will show you how to either turn the startup sound on or off, or to have the startup sound to always be enabled or disabled for all users in Vista and Windows 7.
Note
The Windows Startup sound is not the same as the Windows Logon sound.
EXAMPLE: Startup Sound as "Default", "Always Disabled", and "Always Enabled"
OPTION ONE
To Turn the Startup Sound On or Off NOTE: This option allows any user account on the computer to turn the startup sound on or off. Steps 1 and 2 in OPTION TWO below prevent users from being to do this.
1. Open Sounds settings. (see screenshot below)
2. To Turn Off the Startup SoundA) Uncheck the Play Windows Startup sound box, and click on OK.
3. To Turn On the Startup Sound
NOTE: This is the default setting.A) Check the Play Windows Startup sound box, and click on OK.
OPTION TWO
To Enable or Disable the Startup Sound NOTE: You must be logged in as an administrator to be able to do this option.
This option sets the startup sound to either be always enabled or always disabled, and prevents all users from being able to turn the startup sound on or off using OPTION ONE above.
1. To Have "Startup Sound" Always Enabled A) Click on the Download button below to download the file below.Start_Up_Sound_Always_Enabled.reg
B) Go to step 4.
2. To Have "Startup Sound" Always DisabledA) Click on the Download button below to download the file below.Start_Up_Sound_Always_Disabled.reg
B) Go to step 4.
3. To Allow "Startup Sound" to be Turned On or Off
NOTE: This is the default setting. It will undo step 1 and 2 to allow users on the computer the ability to turn the startup sound on or off as in OPTION ONE.A) Click on the Download button below to download the file below.Allow_Start_Up_Sound.reg
4. Click on Save and save the .reg file to the desktop.
5. Right click on the downloaded .reg file and click on Merge.
6. When prompted, click on Run, Yes (UAC-Windows 7) or Continue (UAC-Vista), Yes and OK.
7. You can now delete the downloaded .reg file if you like.
That's it,
Shawn
Startup Sound - Enable or Disable 
Can't Disable Windows Startup Sound 
