Please give advice on how to solve the problem
Ошибка 137 (net::ERR_NAME_RESOLUTION_FAILED)
Error 137 (net :: ERR_NAME_RESOLUTION_FAILED)
Description of the problem will require a lot of words . 
Yesterday .12.12.2013 . while working in the browser Comodo Dragon, he stopped to open a new page - giving the message ( ), but previously open - worked in the former regime . Following links with working pages give the same effect.
Restart the browser called (net :: ERR_NAME_RESOLUTION_FAILED) to all addresses .
Reboot the router , computer , resetting the router , disabling the firewall Windows (Kaspersky 2013 ), installation of updates waiting ( 13 pieces ) , the removal of Comodo Dragon ( version 30.0.00.00), installation site Comodo Dragon latest version, its removal and installation of the previous version (Comodo Dragon 27. ) , System Restore to the previous day , did not give a positive effect.
When setting the spread of a firewall Comodo Dragon on all browsers - Internet connection disappeared in all browsers (including Opera and Googl Ghrom)
In a router ( dynamic IP address automatically establish and change provider , as well as the DNS server ) showed unknown DNS server ( 8.26.56.26 and alternative 156.154.70.22 )
It’s not my ISP 's DNS server .
Replacement DNS servers 8.8.8.8 and 8.8.4.4 has not solved the problem .
Recovery ISP’s DNS server and remove Comodo Dragon and Googl Ghrom, allowed to reconnect browsers Opera and Nichrom (Ghromium)
But - this combination of software , my computer was working one year , and such problems do not arise.
Virally clean
Cloud scanners found only Babilon toolbar ( and I deleted it)
I am not competent in programming user , but I think it is a conflict and a firewall server , firewall , and possibly , although Comodo Dragon Set firewall exceptions in Windows (Kaspersky 2013 )
The problem occurred in the period from 17.40 to 17.50 , December 12, 2013 .
How do I restore the work of my favorite browser? ( I prefer it for many years , and much used to it ) .