http://support.microsoft.com/kb/2008385

Immediately after you log on, you see the following Windows Activation window:

Windows is not genuine
Your computer might not be running a counterfeit copy of Windows.
0x80070005

You may also notice the following symptoms:

The computer desktop background is black, and you receive the following error message on the bottom right corner of the screen:

“This copy of Windows is not genuine”

You receive the following error message when you view the System Properties: (Control Panel / System and Security / System)

“You must activate today.  Activate Windows now”

If you try to use slmgr.vbs /dlv to view the licensing status, you receive the following message:

Error: 0x80070005 Access denied: the requested action requires elevated privileges

Notes:  This error message may also occur when a command that is being executed requires an elevated command prompt and is unrelated to the issue discussed here.

If you see a message that Windows might not be genuine with no error code, see this Help topic:

Genuine Windows: frequently asked questions

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