News Microsoft temporarily halts Windows 11 24H2 update on PCs with select Ubisoft games — avoiding frequent freezing and black screen glitches in moder...

It is likely that Ubisoft is using a library that takes advantage of some 'feature' that that Microsoft has optimized away. Perhaps an artifact related to Windows 1.2, or a version of MS-DOS that most others have deprecated and removed from their code bases.