Hi, I'm really stuck and cannot work out what I can do. I am running windows xp on a Mac using parallels. I have this just to run one specific piece of software I use to write electrical certificates. I downloaded a copy of xp can't remember from where it was over a year ago i have been ignoring the pop ups about activation. Whist trying to use a usb stick with xp today i was having trouble so i restarted windows and now it won't let me in till i activate it. Obviously I don't have a key as i downloaded the software, can i buy a Key??? I haven't found a obviously answer to that and the online and telephone support from Microsoft has just not got me anywhere. I don't know what to do now, I am going to loose months of test certificates for the electrical jobs I have done if i can't get back into windows. Does anyone have any ideas.......................