How to know My Operating System CPU type?

Windows CPU type

Click Start and in the Start Screen or Start Menu type system information and select the System Information icon.

or

On the Windows operating system, go to the Start menu > All Programs. Open theAccessories folder, then the System Tools folder. In the System Tools folder, select the System Information option.

On the right side of System Information, look for the System Type option under theItem 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.