Network doesn't acquire a dhcp ip

[Ela7mady]

Hi guys, i have a problem since yesterday on my lenovo z5070 wifi network.. When IPv4 is left to dhcp the network is not connected/unidentified.. I'm able to use the Internet only by setting a static ip instead..

When i try to diagnose the troubleshooter says that the device is missing one or more protocol.. Meanwhile i already checked and found all protocols installed..

any help!!

 

[boosted1g]

First try to download, uninstall and then reinstall the wifi drivers for it