From a certain page:
"Cougar build 28 is a fake build of Windows. It's actually based off of several other Windows builds. There is a string inside SETUP31.VER from early Chicago builds that says "Windows Version 3.20 (Cougar)", which seems to have been the inspiration for this fake. It is unknown at this point if any actual Cougar builds existed, as Cougar was the codename for the Chicago kernel." tl;dr probably not.
Comments
From a certain page:
"Cougar build 28 is a fake build of Windows. It's actually based off of several other Windows builds. There is a string inside SETUP31.VER from early Chicago builds that says "Windows Version 3.20 (Cougar)", which seems to have been the inspiration for this fake. It is unknown at this point if any actual Cougar builds existed, as Cougar was the codename for the Chicago kernel."
tl;dr probably not.
The Cougar 028 are everywhere avaible, but if you are in 58s Chicago rename SETUP31.VER to WINVER.EXE, you will get a surprise: Windows 4.0
Thanks for letting me know that it was fake.