So i recently reistalled windows on my laptop, i used the same serial code that came with my laptop and the widows xp disc, this has happened to me before mind you. When i go to update windows it makes me "Activate" windows so i type the serial in and its promts me to call Microsoft cause my serial number is invalid....seriously this same crap happened on my desktop when i got a new motherboard and hard drive, So i called and waited on hold for an hour and said fuck that, anyone know a way around this without calling? I want to update and bring my laptop up to speed lol. When i called for my desktop last yeah i got some bitter lady that was a bitch, and all she did was give me some uber long uber i typed in.