I knew that the Windows 95 sound was written by Eno, but did not know that the Windows Vista / Windows 7 was a Fripp collaboration.
https://davidpapp.com/2012/10/31/the-history-of-windows-startup-sounds/
Somewhere there is a youtube video (or was) of the startup sound being played real slow. Sounds very ambient!
a guy who wrote “Music for Airports” was the natural choice