Understanding whether your Windows PC is running a 32-bit or 64-bit version is crucial when installing apps. Many programs offer both 32-bit and 64-bit versions, and selecting the wrong one can ...

One of the items will be called System Type and will contain the information as to whether or not you are using a 32-bit or 64-bit version of Windows.

No. 64-bit Windows will not run on 32-bit architecture, and, in fact, you can't even install it. That said, you can install and run 32-bit Windows on any hardware, both 32-bit and 64-bit.