"about:blank" pages

[mikkk]

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?

[mapx]

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

[mikkk]

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..

[mapx]

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