There isnt such a file in c:/ disk. Well i thot the combofix would fix it, becouse there were some cases that after scan some minor problems are fixed. I alredy called abou 4 days ago to internet providers, they said there is no problem, so its mainly in the computers. I think is somekind of a virus, becouse after the stationary pc couldnt connect, i ryed to connect thrue wired modem with a laptop to the internet and it connected. But after a day when i transfered some files thrue flash drive, the laptop cant connect either.