Where in Windows do I see that my OS is 32 bit or 64 bit?

[Surya]

Where in Windows do I see that my OS is 32 bit or 64 bit?
Is there any command which will enable me to see this
information?

Thank you.

 

[Matt Coy]

If you right click on My Computer and choose Properties, or hold down the
Windows key and press Pause/Break on your keyboard, if it says 64 bit, then
you have the 64bit version. Otherwise, you have the 32 bit.

Unless you specifically ordered 64 bit hardware and paid a tremendous amount
for it, you have the 32 bit version.