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