I am running beta windows 7 everything has been fine for a month now I keep getting a message that it is not legal. I have restored it twice and when I update I get a message that I might be a victim of counterfeit, It's to run till August 1

Inputting the key does not automatically activate the installation. Type activate at the start menu search dialog box, click the Activate Windows link that will be located at the top of the results window and follow the on-screen instructions.