Microsoft offers both 32-bit and 64-bit versions of Windows 10/8/7. The 32-bit version is also known as the x86 version while the 64-bit version is known as the x64 version.
When installing Windows 7, 8 or Windows 10, you may choose to install the 64-bit version instead of the 32-bit version. If you have installed a 32-bit operating system, you may change it to a 64-bit system.
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