Malicious URL Blocked

So I am not going to lie, I am not too tech savvy. I keep getting a pop-up telling me that a malicious URL has been blocked on pretty much every page I go to. My virus scans do not seem to be doing anything. What can I do to fix this?

follow the guide and attach the logs requested

http://forum.avast.com/index.php?topic=53253.0

AdwCleaner
Malwarebytes
OTL
aswMBR