Laptop wifi getting disconnected often

Hi,
I'm using a lenovo Z50 running windows 7 . I have an airtel broad band , tata photon and an airtel 4g wifi hotspot and the internet get disconnected often for all 3 . It works fine for other users in my home .
What do i do? I get no internet access when connected to the network and it start to work fine 10 mins later.
 
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