benthemeek writes "I am in the interesting position of supporting several small networks (50 PCs or less) that do not have a windows domain. With the End Of Life looming for windows XP, I need to identify all the machines that still run it. Does anyone know of a way I can do a scan for these machines on a network (ether windows or linux) that I can find out what OS is on these networks? I am sure that many others are faced with this same task of getting rid of XP before April and the coming script kiddie doom. I am afraid some little PC in a corner or closet will be overlooked if I just use sneaker-net.."