"Sorry Win 11-tan." by @Clov_erD
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It's 11-chan, or -tan means something?
-tan seems to be a cutesy / baby-talk version of -chan.
Apparently -tan became a thing because -chan was originally a cutesy baby-talk version of -san, but it got adopted into everyday language and wasn't cutesy enough anymore.
11 = Microsoft Windows 11
chan = honorific for girl or child
tan = honorific for baby
Checked it up, apparently it comes from manga, so it's used more there and on the internet than in real life.