But the process of upgrading a PC from Windows XP to Windows 7 won't be easy, Gartenberg predicted. "It's a double-edged sword. For many consumers who may be looking to go directly from XP to Windows 7, the idea of doing a clean install, backing up their applications, backing up their data, can lead to a lot of hassles," he said.

"Considering that there's a lot of XP out there, one has to wonder why Microsoft is taking this approach," Gartenberg added. "It's not going to be the simplicity of sticking a disc in the drive and upgrading. We'll have to see if that affects the upgrade market."

Microsoft said it was working on ways to help Windows XP users make the move, but would not get specific. "Microsoft plans to have other tools and ways to help people get through that process, but we don't have full details on that at this time," the company's spokesman said today.