As we have already reported earlier about the Microsoft’s upgrade plan leak here ,tech ARP is reporting that the Windows Vista PCs purchased by end users between July 1, 2009 through TBD (to be determined)” would qualify for the Windows 7 Tech Guarantee program.
The following are the specific upgrade paths:
Windows Vista Home Premium -> Windows 7 Home Premium
Windows Vista Business -> Windows 7 Professional
Windows Vista Ultimate -> Windows 7 Ultimate
Just check our previous post mentioned above for detailed information about it