Windows 7 Upgrade Advisor from Microsoft scans your PC’s system, programs and devices to check if it’s able to run Windows 7. After a few minutes, the report will let you know if your PC meets the system requirements, if there are any known compatibility issues with your programs and devices, and will also provide guidance on your upgrade options to Windows 7.

NOTE:  Before you run the Windows 7 Upgrade Advisor, be sure to plug in any USB devices or other devices such as printers, external hard drives, or scanners that are regularly used with the PC you’re evaluating.

• Can your computer support the Windows 7 64 bit Version?
• Do you need to run Windows XP Mode Virtualization?

SecurAble, by Steve Gibson, quickly tells if your computer will support the Windows 7 64 bit Version, as well as "Hardware Virtualization" which is required for Windows XP Mode. (Manufacturer’s Tests: AMD & Intel)