Updates Fail, Firefox won't connect, IE does, but redirects

- I ran hi-jack this, but it says it can't find the log file. I can take a print screen of the log file from hi-jack this and upload that if it helps?
- Firefox says it's unable to connect to the internet, but IE connects.
- IE redirects you to different ads when you click on a link.
- When I try to update any anti-virus, they won't connect and updates fail.