after i turn web shield i can access youtube again. i never met this problem with avast previous version. im using windows 8,1 please heelp

Well, difficult to say, but here there is not a problem with YouTube site…
Any other security program that could be interfering?
Are you using avast 9.0.2008?

Tech man,
Avast blocking everything randomly, all up to date including Avast :o

I’d recommend a clean install for both of you guys with problems:

  1. Download Avastclear, Rejzors uninstall tool and the appropriate Avast program edition

http://files.avast.com/iavs9x/avast_free_antivirus_setup.exe
http://files.avast.com/iavs9x/avast_pro_antivirus_setup.exe
http://files.avast.com/iavs9x/avast_internet_security_setup.exe
http://files.avast.com/iavs9x/avast_premier_antivirus_setup.exe

Avastclear : http://files.avast.com/iavs9x/avastclear.exe
Rejzors Uninstall tool: http://rejzor.wordpress.com/avast-cleanup-tool/

  1. Uninstall Avast by control panel [If you don’t have Avast in control Panel go to #4]
  2. Uninstall in safe mode using Avastclear.
  3. Run Rejzors Uninstall Utility in Normal Mode (removes traces avastclear doesn’t) - reboot.
  4. Install the version you downloaded.
  5. Reboot.

You can insert license file during install or after reboot. (If using paid version)