Connection problem

okay so, i have this problem where i cannot connect to anything on my browsers, yet i can use this. About an hour ago i installed Google chrome and then some Java thing, and it stopped letting me connect after i restarted my laptop. Then i done a system restore but it's still now working, and it's so not funny that i dont understand what you are all talking about :| because i'm rubbish with computers, and i dont know about all them number/letter things. Please help me :|:|