Windows Insiders who are running Arm-based PCs should avoid the latest cumulative update if they want to continue running x64 apps via emulation.
Do you think Microsoft might be feeling the heat from Apple to improve the Windows 10 experience on Arm hardware, now that Apple has released its M1 chip? Maybe, maybe not. Either way, Microsoft last month released a preview build of Windows 10 on Arm to Insiders in the Dev channel, which added the ability to run x64 apps in emulation. However, a subsequent cumulative update breaks the experience. Windows 10 Insider build 21292 in the Dev channel is the one that adds support for x64 app emulation. It arrived in the second week of December 2020, and bolstered the functionality of Arm64 devices like the Surface Pro X and Lenovo Flex 5G. Those have been off limits up to that point, as when Arm64 devices first landed, they were limited to native Arm64 code and traditional x32 applications in emulation.
