I have the latest version of Parallels Desktop for Mac on a 2019 iMac and have installed a Windows 10 Professional VM. It has worked fine until recently. Now, however, whenever Windows tries to update with the "2021-11 Cumulative Update for Windows 10 Version 20H2 for x64-based Systems (KB5007186)," the VM stops functioning. After rebooting, the desktop simply flashes on and off (between a half-baked version of the normal desktop and a black screen) and appears to be stuck in some sort of loop with something running in the background that causes a continuous pinning wheel (in the area of the cursor). I have worked with Parallels support and, yesterday, even had a remote session with them, and this issue is still unresolved. They say it is a Microsoft issue and that I should simply reload a previously working pre-Update Snapshot (which I have) and disable Windows Update. Frankly, this doesn't sound logical or correct. Has anyone else had this experience with Parallels? To me, even if this is a Microsoft issue, Parallels should either know what the bug is or should be adapting their software to take account of the problem with the update.