A couple of weeks ago I purchased Crysis Warhead. I just installed it like any other game, put in serial number, and played it. Since them I had a hardware failure and upgraded motherboard. Also had to reinstall windows Vista a second time. When I finally reinstalled Crysis Warhead last night, I received the following popup screen - " The game will not start! For security reasons, only a limited number of machines can ever be licensed by a single purchase. This limit has been reached. Please purchase another registration code, reinstall, and then try again". I tried emailing EA cusotmer service but have not had a reply. Honestly, I wish I had never purchased the game at all. The game is worthless and I just purchased it a couple of weeks ago! I knew nothing about the DRM limitation when I purchased it. I am thinking about contacting the local Consumers Affairs department about getting a refund from EA - their product does not work, and I only installed it on my home computer. And for those of you who make regular hardware upgrades - Beware! You may find yourself in the same predicament as me if you purchase this product and make hardware changes. I am so disgusted by this that I only want a full refund.