Vista - I'm connected to the internet but cant browse

Hi im new to all this ive had vista for awhile now, i can load i.e but everytim i try browse it send me to random websites, it wont let me update my software says im not connected to the internet, yet im connected to the internet ive tried so many anti viruses but its not detecting anything, ive also tried re mastering my laptop with clean vista and this still doesnt work,i also tried refreshing my winsop. i cant acess firefox at all it says page load error or send me again to a random website. its really stressing me out now as ive tried everything i can think of please if someone can help

Seems like your browser is hijacked. Go to safe mode with networking and try browsing some websites. Also run Hijack-This.