If you own one of those latest Laptops and especially from Lenovo, there are chances that you have Realtek Network controller....
To check the driver your laptop needs:
Issue the command: lspci and grep for Network
lspci | grep Network
If the above command output is:
02:00.0 Network controller: Realtek Semiconductor Co., Ltd. Device b723
Then follow the below procedure of installation:
1. First download the file given in the below link:
2. Extract the zip file
3. cd rtl8723be
4. Inside the folder issue these commands:
-> sudo make install
-> sudo modprobe rtl8723be
5. Your wifi access points should be now visible for login/auto internet.
Thanks and hope this helps you - pitch in your comments.
Ananth S Gouri