How to Prevent Users from Changing Default Windows System Sound in Windows 7?

As default nature of Microsoft Windows 7 users can modify system sound settings so that they may enjoy sounds other than default Windows Sound scheme. For home users this configuration is ideal and needs not to be modified under normal circumstances. However in medium to large scale organizations administrators would want to restrict users from modifying default Windows Sound settings for various reasons. As an administrator you can restrict users from doing so by following the steps given below:

1. Logon to the Windows 7 computer using administrator account.
2. Click on Start button.
3. At the bottom of start menu in search box type gpedit.msc and press enter key.
4. From the opened Local Group Policy Editor snap-in under User Configuration expand Administrative Templates and expand Control Panel.
5. Click on Personalization and from the right pane double click on Prevent changing sounds.
6. On Prevent changing sounds box click on Enabled radio button and click on Ok button to accept and confirm your configuration.
7. 
8. Close Local Group Policy Editor snap-in and open Command Prompt.
9. In the command window type gpupdate /force command and press enter key to update the latest configuration on your Windows 7 computer.
10. Close Command Prompt.

More Info:

In order re-allow users to change default sound scheme you need to follow all the above steps except selecting Disabled radio button on step 6.