Genuine Windows XP

Hello, everyone.

I bought a second-hand Compaq notebook recently and was waiting to be able to come online with it. Now I am online I'd like to know how to find out if XP installed on it is genuine and updatable with Windows Update. I don't know whether or not I should use Microsoft's own programme to see if it is genuine or not in case it disables the OS if it's not. What should I do?

Thanks.

via Bleeping Computer Last 20 Posts http://www.bleepingcomputer.com/forums/t/509227/genuine-windows-xp/