Box Turns On Fine But My Monitor Remains Blank

when I power on my computer system, monitor and box, here is what happens.My box turns on fine but my monitor remains blank as it makes a click, click, click sound. Each click turns the green power light on and then off, on then off, for about 60-90 seconds. When the monitor finally responds and turns on I am at the boot page in Windows. Here is what it says: The previous performance of overclocking is failed, and the system is restored to the default settings.