Are you sharing internet with others? Are you connected well(No lag, no bad fps, etc.)? How well is your router positioned, because that might be a cause...
You have Vista on that laptop don't you?
no only windows 7
Well that is odd.This is an issue that's only known for vista.Your connection has a password to it right?Have you tried unplugging both the router and modem then replugging? (This happens for me sometimes, and this works every time)Are there any other networks?
What may caused it / What did you recently changed or Installed that may could have configured anything wrong with your Network Drivers?
[...] there was some contruction done lately by my house so i think they might have hit something. [...]
There you go.
I am not sure.He said 'one' of his laptops, not all of them. If it was really is ISP having trouble then all of his shit would be fucked and he wouldn't even be able to post would he?
Scan for virues, or try disabling TCP/IP protocol.