How to check whether operating system is 64 bit or 32bit?

What is 32 and 64 bit operating system?

The terms 32-bit and 64-bit refer to the way a computer's processor that is CPU, handles information. The 64-bit version of Windows handles large amounts of random access memory (RAM) more effectively than a 32-bit system. This refers to capability of processor that how much memory it can hold from RAM and it will help ro imrpove speed of processing.
To find out if your computer is running a 32-bit or 64-bit version of Windows in Windows 7 or Windows Vista, do the following:

How can I tell if my computer is running a 32-bit or a 64-bit version of Windows?

Open System by clicking the Start button The Start button, right-clicking Computer, and then clicking Properties.
Under System, you can view the system type.

Which version of Windows should I install: the 32-bit version or the 64-bit version?

To install a 64-bit version of Windows, you need a CPU that's capable of running a 64-bit version of Windows. The benefits of using a 64-bit operating system are most apparent when you have a large amount of random access memory (RAM) installed on your computer, typically 4 GB of RAM or more. In such cases, because a 64-bit operating system can handle large amounts of memory more efficiently than a 32-bit operating system, a 64-bit system can be more responsive when running several programs at the same time and switching between them frequently.

How to check whether CPU is 32 or 64 bit?

Go to search bar of windows and type system information.
Click on System information as shown in diagramme.
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System Information




System Type RAM,Processor,System type details


On the right side of System Information, look for the System Type option under the Item column. The associated value, in the Value column, will tell you which type of CPU the computer has in it. If the System Type value includes "x86" in it, the CPU is 32-bit. If the System Type value includes "x64" in it, the CPU is 64-bit.

Reference:https://support.microsoft.com/en-in/help/15056/windows-7-32-64-bit-faq