Microsoft created a giant migraine headache for consumers when they decided not to offer a direct upgrade path from just about every operating system they sell (check it out). What do people do when they have questions? What do they do when they can’t figure out how to upgrade their system without losing all the information they have on their old PC? Microsoft’s answer comes in the form of a note that accompanies their boxed copies of Windows 7 (seen here).
Option A) You will need to find an external storage device and all your installation discs for any software you want on the new PC. Then run the Windows Upgrade advisor to see what will run on the new PC and what won’t. After that save all your files to and settings to an external storage device using the Windows Easy Transfer program. Microsoft then advises you to reinstall all your applications on the new PC. Finally, you will need to do a custom installation of Windows 7. Needless to say, a lot of work!