Microsoft has fixed the date of Windows 7 release as Oct 22nd,but now though this date remains unchanged, Microsoft has announced some limitations.Microsoft has restricted the number of machines which can be upgraded freely to its new operating system to just 25.

Microsoft recently revealed details of the Windows Upgrade Option program for the initial time.Consumers who buy a Vista-based personal computer as of last week are qualified to upgrade their system to Windows 7 at no or modest cost when the latter releases in October.

The limitation has however created controversies from some industry watchers. Michael Silver,Gartner analyst who published a research titled "Enterprises Should Demand Windows Upgrade Option." ,has mentioned that organizations need to comprehend their Windows 7 requirement and obtain the necessary privileges for the most excellent value.