Computerworld reports that Microsoft will reportedly support full upgrades to Windows 8 only from the three-year old Windows 7.

Microsoft has not yet set a release date for Windows 8, but most analysts expect it to go on sale this fall, most likely in October.

The upgrade paths that Foley's sources spelled out were the same that Microsoft revealed in February when it released Windows 8 Consumer Preview, the first public beta.

  Report: Full upgrades to Windows 8 only from Windows 7