Windows 10 running on ARM-based CPUs. In 2016, Microsoft announced a collaboration with Qualcomm to run Windows 10 on its Snapdragon system-on-chip (SoC), which is the processor in many Android-based smartphones and tablets. Qualcomm-based tablets and laptops can execute Windows instructions via an emulation layer, allowing apps that run on Windows 10 to run on the devices. See ARM
Not 64-bit Apps
Only 32-bit Windows apps can run on ARM. If a user's favorite Windows app is only available in a 64-bit version, it will not run on an ARM CPU.
Not the First Time
This is not the first time Microsoft put Windows on ARM chips. Windows RT tablets used ARM processors (see Windows RT