My other computer won’t let me go on the internet!?

Can certainly someone please help me
I own windows vista along with suddenly that said that you will find there’s big hazard to our compute as well as won’t well then , i’ll access the world wide web.I just click firefox/internet explorer and instead of my yahoo home plage you will find there’s vista notice saying that this site may perhaps be dangerous.Whatever I type in to the url standard it wont well then , i’ll see the page simply just saying I have to get pathogen protection through vista.I tried out clicking thee link that said let me browse the world wide web anyway nonetheless it didn’t accomplish anything.We are planning of getting windows 8 soon but for now is thee anything We can do
Thank you!

Reboot laptop…at that black screen tap f8 repeatedly…..go in to safe function with web 2 .0….log about as officer….then obtain and scan using this type of free electric………..

http://download.cnet.com/Malwarebytes-Anti-Malware/3000-8022_4-10804572.html

Yes.A technique restore shall be pointless as you don’t know once the virus became installed.You’ll want to obtain Malwarebytes Anti-malware system to diagnostic for attacked files along with delete the herpes simplex virus.

You can obtain that software coming from download.cnet.com

Reformat laptop before your virus/trojan spreads through your current router and various computers tumble.

have you done any system recover, to the date where your computer did hook up to the internetz!