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How can you know your windows operating system 32 or 64 bits using cmd?

To know your operating system type if it is 32 or 64 bits using DOS, you can do the following:

Open cmd:


Start > All Programs > Accessories > command prompt.



Type the following:
 


echo %PROCESSOR_ARCHITECTURE%
 





or
 
echo %ARCH%



References:
  1.  How to solve computer.
  2. StakeOverflow.

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