Once you have downloaded your .wav files, follow these steps to apply them: How to Control and Customize Your Windows Sounds | PCMag

: Provides various Sound Schemes for Windows 7 , including original and community-modified versions.

Since Windows 7 is no longer officially supported, you can find the original audio files through community archives and enthusiast sites:

: Offers a direct download for Windows 7 Default Sounds intended for modern desktop customization.