go to start and click on run....
type cmd a window will appear.
type ipconfig
if it says ur ip 0.0.0.0 dont touch if it says a number
type ipconfig/release
now ull see 0000 probably
than typr ipconfig/renew it will take a while to renew when it finished, unplug ur modem power for 10 secs and put it back in.
go to control panel and internet connections, local area, click repair...
reset ur pc this will work 99% if u have a modem and cable internet