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Inspiron 3521 wifi+bluetooth not working


I have a dell inspiron laptop which I manually updated to windows 8.1 .

I have been trying to install the wifi+bluetooth driver from the dell website in my laptop but each time, there is some error or the other. Most often, it says 'activate bluetooth using wireless switch', which, when i do, still doesn't solve the problem. I also have this little green exclamation mark on my 'network controller' driver in the device manager list.

As a result, i havent been able to use either the wifi or bluetooth on my laptop. 

the hardware ids for the network controller are -





The bluetooth driver expands to three other things, one of which is 'generic bluetooth adapter'.

I would really appreciate any help possible. 

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