My laptops wi-fi gets discoects automatically

hi i have dell inspiron 3520 laptop,and for last two months i am having problem with my wi-fi coects.I coect wi-fi and when i start using inteet it gets automatically discoected so i every time i have to troubleshoot in network and sharing center.So it is hardware or software issue? Please help me out with this problem and also tell me which driver is needed to be installed from dell web site.I have also attache screenshot of the list of drivers available on dell website for my laptop.Network drivers for Dell inspiron 3520