Please remove your product serial number from your post. You do not want this information to be seen by others as it could cause you problems later. This is not a Magix support site, it is a user site so please be cautious about posting specific infromation such as serial numbers, etc.
Hi Getting your computer ID depends on which version of windows you are running. Usually (for many versions) you go to "Control Panel" then "System" and at the botton you should see your ID number. Please note that if you purchase the application on one computer and are trying to activate it on another the ID numbers will not match so you are going to need to request an additional activation. Remember I think that with Magix you only get to do this 2 or 3 times.