How to find Operating system is 32bit or 64bits

In some software to install first you need to know 'bits' information of operating system you are using. to know this try following steps:

> Right click on the "THIS PC" OR "MY COMPUTER" icon on the desktop.

> go to "PROPERTY" and find 'system type' row. this row will give you data about operating system installed in your pc.

and according to this install only supported software.