I have a MacBook with OS X 10.6.8 and I am getting "no data received" on Google Chrome, "the connection was reset" on Firefox and "cant open the page" on Safari.
Google search engine works on Chrome and Firefox but nothing on Safari. Scanned the system with my antivirus and found no issues. Cleared the cookies and cache on all browsers and main system with no change. Mac Office did an update prior to this problem but can't seem to get out of this.