If you are getting kicked every X amount of minutes and constantly, then you should call Apple or visit a an Apple Store. As far as I know, if your computer is having the "WiFi" issue, they would take it from you and give you a new one.
More details on your issue would help any member of the forum assist you further, since your comment is quite vague, but I just wanted to mention the most horrible scenario, just in case.
More details on your issue would help any member of the forum assist you further, since your comment is quite vague, but I just wanted to mention the most horrible scenario, just in case.