Microsoft begins testing x64-on-ARM emulation

As of this writing, Windows 10 on ARM is an ARM64 platform, which only supports 32-bit x86 apps via a built-in emulator. It is not possible to run traditional 64-bit apps in this OS. Earlier, we mentioned that this will eventually be changed. It looks the change goes live.

Rafael Rivera has discovered a couple of hidden bits in the latest build of Windows 10 Insider Preview, which is 20236.

The above change was expected to come with 21H1, but the company has changed its plans. Recently, Microsoft announced that Windows 10 on ARM will get support for 64-bit binaries in this November.

We are excited about the momentum we are seeing from app partners embracing Windows 10 on ARM, taking advantage of the power and performance benefits of Qualcomm Snapdragon processors. We heard your feedback and are making Microsoft Edge faster while using less battery, and announced that we will soon release a native Microsoft Teams client optimized for Windows 10 on ARM. We will also expand support for running x64 apps, with x64 emulation starting to roll out to the Windows Insider Program in November.

So, we soon will able to test how the x64 binary layer works on ARM64. It should be a matter of a few Insider releases.

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