CANNOT FIND INTERNET EXPLORER

I HAVE AN INSPIRON 600M,  I AM USING TMOBILE AS MY ISP, SONY ERICSSON GC89 ADAPTER.  SOMETIMES I  GET ERROR MESSEAGES WHEN TRYING TO CONNECT TO THE INTERNET.  I HAVE UPDATED MY DRIVERS.   WHEN I TRY TO CONNNECT TO INTERNET EXPLORER,  I GET INTERNET EXPLORER CANNOT BE FOUND.  I HAVE TRIED THE DIAGNOSTIC AND I AM TOLD I HAVE MORE THAN ONE  ETHERNET.  HOW CAN I CORRECT THIS PROBLEM? AND BE ABLE TO USE THE INTERNET WITH ANY PROBLEMS. 

 

THANKS FOR YOUR HELP.