Windows End Fourth Edition

Update 5 Version
Windows End FE is an operating system released during the last breaths of Microsoft.

Update 6 Version
Windows End FE was released, two years before the year ∞. This time, Microsoft was not dying at the time of the release.

Trivia

 * ATE, YOV, EEE, and other pre-U6 future eras are replaced with xEx.
 * 1e+308 is the last year before ∞ according to LancerWikiEditor.
 * In newer updates, Windows End FE is now dated to the year 1e+308-1.