If you bought a Windows 7 PC on or after June 2nd 2012, then you are entitled to an upgrade to Windows 8 Pro for just $14.99. The upgrade has been quite easy to obtain until now.
Before all you had to do was enter the name and manufacture of your Windows 7 PC. Consumers wishing to upgrade now must enter their Windows 7 licence key to obtain the cheap upgrade to Windows 8.
We are unsure as to why the further validation is required but we are speculating that it is the result of users abusing the upgrade system.