Windows XP activation key: activate by phone

Been trying to install a copy of windows xp onto my virtual machine to do some testing. However, upon starting my freshly installed windows xp that resides on the virtual machine, it appears that the windows requires key activation (which is a norm). Then without hesitation, I went and followed the steps in Easy Way to Activate Windows Home Server (Crack and Bypass Activation). Apparently, the registry editing worked. The key icon residing at the right bottom pane has gone after restarting the machine. However, am not sure if it will bypass the genuine windows validation process upon updating the windows. Probably will try it out if there's a chance.