I have read about GPOs and deploying software on a large group of PCs at once, but never actually done it. We have a network of about 90 users and we are running WINDOWS 2003 active directory domain function level to support PCs that are running XP SP3. I need to upgrade the WINDOWS MEDIA PLAYER on about 20 PCs so they can view a demo that is coming up soon. What is the best way to do it? Is this something that could be timed to run at night or will it have to be deployed as they log in? I am assuming I will have to put all the PCs that are involved into a single group and deploy to the group??? Is that the best way? All advice and details are welcome. I do not want to do anything that will bring the network to a halt at 8:30am when everyone starts logging in.