Is the problem ADSL router or Windows:

[zf490]

I have a router type of Billion. Connected with a computer ( windows 7 ) through wireless connection.
When i run the router and computer, the led of router works well ( PPP led . ADSL led )
The computer gives it connected to the router, but there is no connection to the Internet.
The problem go away when. Re-run the router
What is the cause of the problem Repeated

[zf490]

I have done a recovery for Windows by Norton Ghost 15. And the problem went
I think the reason may be one of the programs installed by the former