Can I use my activation key on more than one computer? Rovio Support Team June 01, 2017 14:55 Updated An activation key can be used to activate the Angry Birds game that you purchased on a maximum of three Windows PCs. Related articles How can I get an activation key? I'm sure I'm connected to the Internet, so why is the game saying that the registration has failed? Why am I not getting any updates? I switched to fullscreen mode and I see graphical errors! What's up with that? Didn't find what you were looking for? Comments 0 comments Article is closed for comments.