internet explorer not working

I CAN GO ONLINE THREW AOL BUT WHEN I TRY TO USE MY INTERNET EXPLORER IT SAYS THE PAGE CAN NOT BE DISPLAYED, I DONT KNOW WHAT THE HELL IS GOIN ON NOW IM PRETTY GOOD WITH COMPUTER AND I RAN AD-AWARE REGISTRY CLEANERS, I FLUSHED MY DNS SERVER AND EVERYTHING AND I CAN'T GET IT TO WORK DOES ANYBODY KNOW WHATS GOIN ON I WOULD APPRECIATE ANY HELP THANKS