How to find is Operating System is 32 Bit or 64 Bit

To find out if your operating system is 64bit or 32bit, open a
command prompt and type "SET Processor" <enter>. This will show
you all the environment variables that start with PROCESSOR. For
example, if your operating system is 64bit, whether AMD or Intel eith
EM64T extensions, you'll see:

PROCESSOR_ARCHITECTURE=AMD64

On an Intel Itanium you would see:

PROCESSOR_ARCHITECTURE=IA64

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