Edit
Fixing DNS ERROR 105 in three steps.
1)Change Wireless adapter settings from network connections, go to properties>internet protocol version 4>again properties> change to use following dns server.preferred dns to 208.67.222.222 and alternate dns as 208.67.222.220 and click validate setting on exit and ok.
- if you are using windows7, disableMS WINDOWS VIRTUAL WIFI MINI PORT bu running below 2 commands in" RUN" (windows key+r) shortcut. one after another.
1) netsh wlan stop hostednetwork
2) netsh wlan set hostednetwork mode=disallow
and after running above commands close RUN and go to network connections and DISABLE Microsoft virtual wifi miniport by right click and disable.
3)If you are using google chrome go to OPTIONS> UNDER THE BONNET>CHANGE PROXY SETTINGS>CONNECTIONS>LAN AREA SETTINGS> Tick use a proxy server for lan and click ok.
(if you are using some other browsers, check for similar option and change settings as above)
additional solutions
a) check for your anti virus firewall to minimum(if it is problem only)
b)reset modem(only for advanced users who can once again set up connection settings)
c)ping to router or a site to know the problem.
hope this helps to some one Sorry about my english. bye