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Hi Michael. My name is***** you for your question and the opportunity to assist. The version of Windows 10 installed on a computer is either 64 or 32 bit. To switch from one to the other would require a complete reinstallation of Windows with the desired version. A 64 bit version of Windows (which is most likely what you have now) can run both 32 and 64 bit software. Can I ask what the issue is you are having?
You don't have both 32 bit and 64 bit. You have one or the other but not both.
If you have 32-bit Windows 10 installed now
you have to do a complete re-installation of Windows 10 to make the switch. Microsoft will allow you to do this.
First thing’s first, you’ll need to confirm whether the CPU in your computer is 64-bit capable. To do so, open the Settings app from your Start menu, select System, and select About. Look to the right of “System type.”
If you see “32-bit operating system, x64-based processor,” this means you’re using a 32-bit version of Windows 10 but your CPU can run a 64-bit version. If it doesn’t say you have an x64-based processor, you have a 32-bit CPU and can’t upgrade to the 64-bit version.