When I start up each day I get a screen from Microsoft asking me to allow them to check if my software is legal. I'm reluctant to do this because this PC is not new to me. I bought is used from a respectable corporation that I'm sure they registered it properly but still I'm a little unsure if I should allow them to look at my stuff. Are there any problems with using a second hand computer and its' software this way ? should I click OK ?