Intel Corporation WiFi Link 5100 not working

I have just installed Kali Linux and everything seems to work well except for the wifi adaptor. It is an Intel Corporation WiFi Link 5100. I followed the steps suggested in the Debian wiki but with no success. If I type airmon -ng I get the following result:

PHY Interface Driver Chipset

phy0 wlan0 iwlwifi Intel Corporation WiFi Link 5100

I imagine that it means that the wifi adaptor is recognized by Kali, but still it doesn't work, since there is no wifi icon in the task bar and when I try to see the existing networks around me, Kali says that "there are no networs available". Any suggestion would be greatly appreciated, thanks in advance.

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