Uninstall the awful Dell driver and check the option to delete the files associated with the driver. Windows 8 has its own driver built-in and the signal is WAY better.
The Dell Inspiron 14 7437 wifi connection is really horrible. I just bought this laptop in December, 2013 and I found it can't connect to the wifi! Sometimes I can connect it to the wifi, but it's very week and not stable. I used another laptop in the same location and the signal is much stronger and it won't be disconnected. I called the technical support, but they said they can't find my service tag since I bought it in BestBuy and I need to contact BestBuy first. I'm not satisfied with the answer and I really want to return the laptop... Is there anyone who bought this model of laptop have the same bad experience? How did you solve it?  Thanks!
Dell Inspiron 14 7437 wifi connection really horrible!!