It is WINDERS99
And here are some of the new "USER FRIENDLY" commands:
The RECYCLE BIN icon is labeled "Outhouse"
The MY COMPUTER icon is labeled "This Infernal Contraption"
The DIAL-UP NETWORKING icon is called "Good Ol' Boys"
The OK buttons all say "At's aww right"
The YES buttons all say "Shore"
The NO buttons all say "naaaa"
The FIND menu is labeled "hunt ferit"
The GOTO menu is labeled "over yonder"
The BACK button is labeled "back yonder"
The HELP menu is labeled "Help me out here"
The STOP command is called "Ternit off"
The START command is called "crank it up"
The SETTINGS menu is labeled "sittins"
Programs are labeled as "Stuff at does stuff"
Documents are labeled as "stuff i done did"
and of course it does not have a "SPELL CHECKUR FEATURE"