SRWare.net

after opening of any page i can see loading of the page finished by disappearing of everything and seeing of empty white page titled by "about:blank" Could you help me?

are you using some security software like comodo with all the web shields ?
test your iron only with the default windows firewall and without any other security software

Thx for answer, you were possibly right - it suddenly works - maybe an update of Avira or other security sw. Strange that Opera, IE and Chrome were not involved..

Opera, IE and Chrome are in the "official" list of all these security software