hey ondrejz i have reinstall avast safebrowser as your instructed and can say it work fine agian even the filter for adblock is eneble after the reinstall. so thanks for your help agian. and with that i think we can mark this topic as resolved :slight_smile: update when the latest update for the browser is installed i get the same problem agian with a greyed out adblock and no filter activited so have to run it like admin to fix it. i did a clean install for the avast just to be sure i can add. but in the old relase there is no problem with the adblock there it works but not in the latest relse.