Unblock Pages All Of My Iternet Pages Have Been Blocked For Some Odd Reason And I Cant Figure Out How To Unblock Them.Help?

All of my iternet pages have been blocked for some odd reason and i cant figure out how to unblock them.Help? - unblock pages

I downloaded an antivirus software in the accident blocked all my websites. So I uninstalled and this time he did not say what .....? Bocking Ive tried everything!