hi avast pro can block web site, but iit has a feature to alow tou to add a web site to the exlude blocking list it would be good it you do that. + add a report button to it, so you can identify if its a fauls block ---- it also like to be told it web site is block in firefox. not just.. white blank screen as if you have no inter.. connection lost/reset make it come up with .. web site blocked bt mw bytes... .... Also, i get a lot of install fails (updates) from time to time kills my installed copy (no longer comes up in tray- loading error) i then have to uninstall + reinstall + with my paid code again. win 7 64bit sp1, but it did it with xp sp3 on old (now dead machine)