Never ever update your computer

My lap top which I just got back and had to jump through hoops to get to sinc with my main computer, needed an upgrade. Some software needed it so I agree and hit the OK button and now I can't get to the internet???? I am so frustrated I could cry!!! You know when computers work they work great but when they don't, you sit there and look dumbfounded. I have tried everything and am now second guessing myself. Indeed I am worried that I will screw it up totally and I know it is just one click away from finding my Mac Airport, but I can't find that one darn click. I take deep breaths and am just tired of trying.