-Windows' logo
-Windows (pronounced as Negative Windows) is a operating system by Microsoft in 1998, and lasted until 1999. It is very bad, with only the Windows Vista being worse.
It's considered bad because every button does the opposite of what it should do, for example, press up in a game, and you'll crouch, press the Kill Key, and all enemies will come back to life and kill you. This makes it a very tedious task to do work on a -Windows, and only Chuck Norris was able to make a full paragraph on one.
Microsoft ended up getting 8,000 complaints about how bad -Windows is, they didn't care, until they were threatened at Ban Hammer point to discontinue it, so they on February 5, 1999.