Google redirecting virus

[blacklic0ric3]

Yesterday I kept getting a fake antivirus pop up on screen telling me to update so I ran norton 360 n got rid of it. Now whenever I google something and click the link, I get redirected to random sites and sometimes that same fake antivirus thing(except on the browser). Norton wont pick this up in the scan and neither will combofix, what should I do?
Also, if you suggest a download please post a link (as i cant google it)

PS- happened after I let sister borrow flashdrive...thatll never happen again

 

[nickdave]

http://www.malwarebytes.org

You may have to enter safemode to do so.

To enter safemode tap f8 while the computer is starting up, then select safemode with networking.

Those are nasty programs but malwarebytes normally gets rid of them.