Modern Operating Systems are coming with 64-bit support and hopefully everything will switch to 64-bit in a short while. Most modern computer processors are 64-bit compatible but if you have a slightly old PC and you want to install a 64-bit Operating System then you’ll have to first confirm if the system is 64-bit compatible or not.
While most techie people will be able to answer this question pretty easily but if you don’t have an idea of how to check whether the system is 32-bit or 64-bit compatible, you will need to use 64-bit checker.
64-bit checker is a portable tool (68KB in size) which can be run from a USB flash drive. When run, it will list if the system is currently having 32-bit Windows or 64-bit Windows. In the details you can see whether your CPU supports 64-bit version of Operating Systems.