To find out if your computer is using a 32-bit or 64-bit Intel processor look up the model specifications at http://ark.intel.com/
If it is a 64-bit processor the following should be seen in the table "Intel® 64: yes".
One can also run CPU-Z to find out. Under the CPU menu Instructions field you should see EM64T listed.
AMD 64-bit processors will show AMD64.
In Windows, once can also get a description of the processor by typing into a command prompt the following: wmic cpu get description
The instructions here are on how to find out if you are using a 32-bit or 64-bit CPU not how to find out if you are using a 32-bit or 64-bit version Windows operating system. Some of the instructions found on other sites although claiming to address the former seem to be answering the latter question and not the former.
