Yes, it’s just the title. I use avast! for a long time, yesterday it updated. So today, I’ve to disable avast to go Facebook, Google or any other pages.
When I enable avast again, the pages which I have go to still can be loaded, but the page I haven’t is blocked until I disable avast again.
Please help.
Perform a clean installation of the latest version with the off-line installer and check if the problem is solved.
Clean Install of Avast:
https://goo.gl/4Ptzkf
thank you. I will try them the weekend. Hope it works
It works!
Thank you very much.
Glad to hear that. 
Hello everyone,
We were able to identify and fix the internet connectivity issue that occurred after the latest Avast 17.4 update.
The fix is being distributed via a micro-update to Avast Web Shield.
To download the fix, please follow these steps:
[ol]- Turn OFF Avast Web Shield (internet connectivity will start working)
- In UI go to Protection > Antivirus and turn Web Shield OFF or
- Right-click the Avast tray icon > Avast shields control > Disable permanently (to turn OFF all shields)
- Go to your Avast installation folder - usually “C:\Program Files\AVAST Software\Avast”
- Run (double-click) AvEmUpdate.exe and confirm the UAC prompt
- Avast will now silently apply the fix
- Wait for about 5 minutes
- Restart your computer
- Turn Web Shield (or all shields) back ON
- You are now again connected to the internet and protected[/ol]
Thank you for your patience and your help in resolving this issue.
Sincere apologies,
Avast team