These are sounds from Microsoft's Windows Longhorn (which is an unreleased version of Windows with a lovely sound scheme). I do now own these sounds.
Windows - Main Windows community for all versions of Windows. Windows Mobile - dedicated to Windows Mobile OS and discussions about it. Windows Insiders - dedicated to Windows Insider program, WI builds troubleshooting. Xbox Insiders - Official Xbox Insiders community. Xbox One - dedicated to Xbox One console and its peripherals, news and discussions. Technology & Video Games The 'Windows Longhorn/Vista Beta' startup sound (and sound scheme) that everyone knows and loves is not used in any pre- or post-reset builds of Windows Vista (codenamed Longhorn) at all (self.MandelaEffect) submitted 1 year ago * by zakawer2.
The fizzling sound is from Portal Project Alpha (which I would HIGHLY recommend you check out if you haven't already), and the Beta turret 'Searching' is from VALVe. The rest are from Longhorn. BTW, these sounds are really quiet, but you can hear them.
![Windows Longhorn Sound Scheme Shell Windows Longhorn Sound Scheme Shell](/uploads/1/2/5/4/125495729/149692493.png)
If anyone knows how to make them louder let me know. You CAN use these in your own mod, but I get to playtest it!:P.