This review includes
- Windows 7 32 bit and 64 bit compatibility report for hardware and software.
- Does your System meets the minimal requirements for Windows 7.
- Depending on your OS if you can upgrade or need clean install of Windows 7.
- Which of your existing software will not port to windows 7.
Here is the home page for this product : http://www.microsoft.com/Windows/windows-7/get/upgrade-advisor.aspx
Direct download link is : http://go.microsoft.com/fwlink/?LinkId=161223
Most of you will be pretty comfortable moving to Windows 7 32 bit, but if you are planning to move to 64 bit version. I recommend going thru this guide : http://abhinav.tgerm.com/2010/10/are-you-windows-7-64-bit-ready.html