https://wccftech.com/apple-shares-how-to-fix-windows-10-distorted-screen-bug-on-mac/

Several Apple users had reported experiencing a bug when they ran Windows 10 on their Macs. The right side of the screen would appear distorted and start flickering, but only when running Windows 10 on a device with AMD Raedon graphics. For those who were using external screens, the distortion sometimes impacted the entire screens.

Another issue would push Windows 10 Installer to say that the Mac isn't ready for this version of Windows 10 because of an old AMD graphics driver. The iPhone maker has now released a new support document, sharing some workarounds and fixes to this annoying bug being experienced by Windows 10 users on some variants of MacBook Pro, iMac, iMac Pro, and Mac Pro.