Web Shield keeps prompting on every single web page i try to access...

Hi!
I’m using Avast Free Antivirus on Windows 7 Ultimate.

Ever since the latest upgrade to Avast Free 2014, i’m facing an issue. Every single web site that i go in, Web Shield will prompt me:

“avast! Web Shield has blocked a harmful webpage or file”

any body has any idea?

thanks

Follow this guide and open anew topic under viruses and worms section: http://forum.avast.com/index.php?topic=53253.0

Attach the logs there. There could be malware on the system. Can you attach a screenshot of the popup if possible?

Needed are Malwarebytes, OTL and aswMBR.

ok…thank you