How to upgrade from a 32-bit to 64-bit version of Windows 10
Windows 10 is available in 32-bit (x86) and 64-bit (x64) architectures, and if your PC is using a 32-bit installation, you can upgrade to 64-bit as long as you have a capable processor and enough memory.
from https://www.windowscentral.com/how-upgrade-32-bit-64-bit-version-windows-10
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