t work and you want to revert back to the original sound.

Step 4: Now copy the two renamed files to the C:\Windows\Media folder and restart your computer! You should now hear the new music, songs, or sounds play rather than the default sound.

If you don’t like some of the other default Windows sounds, you can change them also in the same manner. Just create a file that is named the exact same as the one in the Media folder and then either replace it or move the original and then put in your new one!

Overall, it’s really simple to change the Windows login and logoff sounds, so it’s something most people will be able to do! Also, there’s no real way you can “harm” or “mess up” your computer. Enjoy! Source: TechnoSpot