help people! I have installed a fake WindowsActivationUpdate on my computer, it rebooted my computer and now I see this suspicious page on my computer screen. it asks me to enter a product key, but it says that each attempt is invalid, although i am 100percent sure that the key I have entered is correct. What should I do? There is a customer support number but I feel that there’s wrong with this update and I don’t wanna dial number. Please explain me what is going on (if you know)…