There are at least three issues affecting Windows 11, and Microsoft has acknowledged two so far. Fixes coming soon.
Windows 11 KB5120998 can also turn desktop wallpapers black. Plus, another strange bug says Microsoft Defender Antivirus is off even though it's functioning normally.
Windows Report on MSN
Windows 11 KB5124008 fixes mouse cursor & animation issues triggered by KB5120998
Microsoft has fixed Windows 11 mouse cursor and animation issues triggered by the KB5120998 update with KB5124008.
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