malicious url blocked message

I have the free version of avast. I am getting a warning message, over and over and over. I have tried uninstall and reinstall, system restore. How do I get this message to stop. I think avast is trying to sell me their product. Can anyone advise me what to do? I am pc dumb, so be very simple in instructions. Thank you

Hello,
what it the URL? Post the screenshot of avast!'s alert window, please.

Milos

Additionally there may be an infection present, probably a FF/Chrome addon

Follow the steps here http://forum.avast.com/index.php?topic=53253.0

I’m not sure what you mean, but the message I keep getting, like every 5 seconds, is malicious url blocked, object:wewillrocknow/x/. infection:URL Mail, Process:windows\system32\sychost.exe

Plus 2 other similiar warnings.
I am at a loss.
thank you

Could you run the programmes as shown in the link please and I will help you remove it

Attach the logs in this thread

I am getting the same thing. Started yesterday.

follow this guide…create a topic in virus and worms forum section and attach the logs
http://forum.avast.com/index.php?topic=53253.0