Welcome to Justanswer.com, my name is ***** ***** I will do my best to assist you.
5$ is just the initial good faith deposit. With that being said,
To get started, I need to know what type of computer you are using, a Windows XP, Vista, Windows 7, Windows 8, Windows 10 or a Mac.If its a Mac, please check the OSX version as follows, Click the apple sign at the top left of your screen, then click about this mac. And then where it says version, send that to me as a reply.
So your applications folder and address book dissapeared..
Question, did you by change sign into or create a new account on your mac?
If you go to system prefers, user accounts. Do you have more then one account showing?
If not, then your applications folder is probably just hidden. To fix it, open your finder / spotlght/ magnifying galss and type in terminal
Then start the terminal app and run this command
sudo chflags nohidden /Applications
Hit enter, then type in your macs admin password, the one you use to boot the mac. It wont sh ow you typing so be careful when you enter it.. Then press en ter.
T hen, see if the applications folder is showing.. If so, try to launch your address book now.. will it open?
If you get stuck at any point let me know where, so I can assist you further.
I strive to provide great service, and greatly appreciate a 5 star rating clicked and submitted when you are satisfied.. I always answer follow up questions.Dustin S.Senior Technician and Network Switching Systems Operator / Maintainer.