Validating windows 7 ultimate
In fact, the entire activation system is simplified to a single button push.Although the programs work on both x64 and x86 versions, you may face a situation when some activator will not work properly exactly because the program is not compatible with the OS version.If you find yourself in such situation, just disable the protection. To re-activate a Windows 7 PC, you’ll need to open the Windows Activation tool.Actually this problem occurs when there is a lack of permissions on a registry key "HKEY_USERS\S-1-5-20".By default, System, Network Service and Administrator accounts have "Full Control" and "Read" permissions on this registry key.To do so, click the Start button, type “Activate” into the Start menu, and click the Windows Activation shortcut.Did you have any trouble re-activating Windows with Microsoft?
This will depend on whether you have an OEM or retail copy of Windows installed on your computer.
Its a common problem which lots of Windows 7 users face.
Also when you checked System Properties, you got following error message: You must activate today.
In addition, product keys are only valid for certain versions of Windows.
Therefore, this method is not recommended, since you will simply waste time searching for a working key for your version of the system.