FSX PROBLEM NEEDING HELP

I RECENTLY RELOCATED MY COMPUTER, I HAVE SET IT BACK BUT THERE IS NO INTERNET CONNECTION AVAILABLE.  I WENT TO PLAY FSX AND THE GAME WOULD PAUSE DURING SIMULATION.  I SPOKE WITH MICROSOFT TECH , THEY ADVIDED UNINSTALL FSX, SHUT COMPUTER DOWN , REBOOT AND REINSTALL.  NOW THE GAME STILL PAUSES DURING SIMULATION  SOME BUTR THEN THE GAME JUST STOPS WORKING AND GOES BACK TO THE DESKTOP AND FREEZES MY COMPUTER.  PLEAS ANY ADVICE AVAILABLE WOULD BE GREATLY APPRECIATED.