Windows Anytime Upgrade feature in Windows 7 allows users to upgrade their already installed operating-system into higher versions letting them bypass limitations associated with lower editions without requiring to reinstall again, with this feature all the user needs to do is to buy an upgrade key from Microsoft online or a local retail and upgrade their OS edition without hassles in less then 10 minutes. The news is that hackers have now cracked open the Windows Anytime Upgrade key generation algorithm for Windows 7 and released the utility "Windows 7 Anytime Upgrade CD-Key Generator" which churns out illegal upgrade keys allowing pirates to upgrade and activate Windows 7 OS to higher SKU's like from Home Premium to Professional or Ultimate without paying Microsoft a dime.