Avast Free Antivirus - constant "Threat Secured" notification

[Robert601]

Hi,
I have suddenly started receiving "Threat Secured" notifications from Avast free antivirus any time I try to do ANYTHING online.
I have attached the notification. It's driving me mental.
I am not knowingly trying to access the site mstat.acestream.net
Even though a search doesn't list it as being malicious.
I had an app called Acestream on my machine which I have now uninstalled but hasn't made a difference.
Any assistance would be greatly appreciated,
cheers

[DavidR]

If you haven't already done so:
Start by clearing your browser cache and cookies, including 3rd party cookies and restart your browser.
If that resolves it you should be good to go.
If it doesn't try running your browser with add-ons disabled.

If that resolves it, have you added or updated any add-ons ?
If so try disabling that add-on - and restart and try again.

If still not resolved and you are using Chrome based browser - try this suggest by Avast Team member 'lukor'
What about page notifications? Here: chrome://settings/content/notifications ? Do you have all cleared?