You seem to post an incomplete problem which might be hard for anyone to answer what exactly you are experiencing. however, looking at the one liner, i guess you are unable to internet due to either Limited WiFI connectivity or no network found..
First off please try the following
Press Windows Key + X to open Windows mobility center, and see if your network capability is off or on... Either it is on or off, click on Turn Wireless off and then again click to turn it on !! the switching between off and on might resolve the issue ..
Also, resetting the TCP using the command lines given below in the command prompt:
netsh int tcp set heuristics disabled
netsh int tcp set global autotuninglevel=disabled
netsh int tcp set global rss=enabled
check wirless drivers also.. update to reinstalling might also help you cope up with the issue....
In other case, go through the following link to find more options what you can do to fix this out: