32-bit or 64-bit
this works for all windows versions

First press start in the left bottum corner, then find computer, if computer isn't there then go on the desktop and see if it is there. anyway right click on computer whatever if it's on the desktop or in the startmenu, just right click, when you have right clicked computer then  go down to properties and look for Systemtype, that line says either 32.bit operatingsystem or 64-bit operating system