Question : Windows 7 - Windows could not be activated

I installed Windows 7 on a system. using our Enterprise MAK key.  It has been running fine for a while and now I am getting the following error.

Windows could not be activated
If you continue to see this error message contact your system administrator or technical support department for assistance.

The Software Licensing Service reported that the application is running within the valid grace period

Any ideas on how to get this to register properly?

Thank you,

Answer : Windows 7 - Windows could not be activated

It's happen to me before. Try Control Panel > System, hit Change product key, and enter your key (even if it's the same one you entered before). It should activate fine after that.
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