Microsoft is going to offer free upgrade to Windows 7 who buy PC after july 1. According to TechARP, Microsoft will allow original equipment manufacturers to purchase Windows 7 upgrade media, which they can then offer to customers who buy a Vista-power system between July 1, 2009 and a date to be determined.

End users will have to meet these requirements to be deemed eligible for the upgrade to Windows 7 when it is released :

• End users must purchase a new PC that is pre-installed with an eligible Windows Vista Operating System (OS), during the program eligibility window.

• The PC must have a valid Certificate of Authenticity (COA) attached.

• The only Windows Vista® versions eligible for the program are :
  1. Windows Vista® Home Premium
  2. Windows Vista® Business
  3. Windows Vista® Ultimate

  * Microsoft Windows Vista® Home Basic, Windows Vista® Starter Edition, and Windows® XP (all editions) are not qualifying products under the program.

• The Program does not support multiple upgrades for medium, large, or enterprise customers. Customers that want to upgrade multiple PCs should use the appropriate Microsoft Volume Licensing program.  See www.microsoft.com/licensing for more details.

• The following are the only valid upgrade paths under the program :
  1. Windows Vista® Home Premium -> Windows® 7 Home Premium
  2. Windows Vista® Business -> Windows® 7 Professional
  3. Windows Vista® Ultimate -> Windows® 7 Ultimate