Make sure ashwebsv.exe has the apropiate permissions in your firewall.

And peoples,

just saying somthing isn’t working is not enough for us to help you.
You really need to give more information. Like:

What exact version of Avast? (number is like x.x.xxx)
What are the exact problems?
When do they happen?
What OS are you using?
etc etc etc.

We can do a lot, but we are not mindreaders.
And please do not post in someone elses thread if your problem is different.