64bit Checker
http://www.igorware.com/64bit-checker

64bit Checker is a tool that will show you what version of Windows is installed on your computer, is it 64bit or 32bit version of Windows, and is your processor capable of running 64bit operating systems. Features include: a) detects if you have 32bit or 64bit version of Windows; b) detects whether your processor supports 64bit operating systems (if you are not sure that you can install 64bit operating system on your computer); c) save information to clipboard, text or html file; d) freeware; and e) portable (no installation needed, no need for .net or runtime library’s of any kind). This will be added to the tools section of Research Resources Subject Tracer™ Information Blog.