Tried redesigning Win10 with MD3, but it didn't work out, so I got carried away. How similar does this look to Win10?
https://redd.it/1kgewu0
@r_Windows_Redesign

Windows Vista/7 Logo - Fluent/Modern Style

https://redd.it/1khig9s
@r_Windows_Redesign

Modern Fluent UI "Disk Formatter" Dialog Redesign

https://redd.it/1kibrir
@r_Windows_Redesign

What if the Windows XP and Vista start orb had a baby? This is what you'd get. Link in comments!
https://redd.it/1kisdvx
@r_Windows_Redesign

Modern Fluent UI "Turn on BitLocker " Dialog Redesign

https://redd.it/1kjs66l
@r_Windows_Redesign