Requirements: Microsoft .NET Framework 2.0 and XP SP2 (for XP only)
Before you upgrade to Windows 7, run this free Microsoft utility. Upgrade Advisor scans your PC to see whether it's ready for Win 7. If it detects a problem--from insufficient memory to incompatible hardware to outdated software--it will let you know in a summary report.
Before you begin: Be sure to plug in and turn on any USB devices or other devices, such as printers, external hard disks, and scanners, that you regularly use with the PC you're checking.
The Windows 7 Upgrade Advisor scans your PC for potential compatibility issues and lets you know about your Windows 7 upgrade options. Within minutes, you'll get a report that tells you if your PC meets the system requirements, if any known compatibility issues with your hardware, devices, and installed programs are found, and gives guidance on what to do to before installing Windows 7 on your PC.
Download it from microsoft.com/downloads/details.aspx