Microsoft wants Windows 7 users to Upgrade
While being the cheapest version of the OS, Windows 7 Starter Edition will be limited to running only three programs 
at a time. Users who don’t like this will have the convenient option of upgrading to a version of Windows that isn’t bound by the three program rules.
With netbooks and budget notebooks increasing at a rapid rate, Microsoft would find it important to not simply allow the cheapest Windows 7 to be the most widespread version on the market.
Upgrading to a higher version of Windows 7 just involves a license switch. The system would recognize that certain features are then “unlocked,” opening up more of the OS.
How would Windows 7 handle upgrades on a stripped-down, ‘lite’ version? This is even more of a puzzle now that we know users will have the option of not installing previously mandatory software such as Internet Explorer 8 or Windows Search.
Clearly, the message here is that Microsoft wants everyone to run Windows 7 Home Premium, which the company already forecasts to be the most popular SKU. With the streamlining of Windows 7, it could be Microsoft’s aim to have Home Premium on netbooks as well.
