this is the key. I've been looking for a solution for two months for this thing. download the full software with drivers for your version of windows 8.1.
Hi I recently bought a Dell Inspiron 14 laptop running Windows 8. Lets be clear that this is not a problem with my internet service as I have 4 other computer running in my house with no network problems whatsoever. My laptop however, has a netowrk problem where after every 15-20 minutes, the connection drops, turns into limited and I need several tries over 5 minutes or so to get it connected again. This is very frustrationg as you can imagine. I've tried uninstalling my pre-installed McAfee antivirus, updating all Windows software updates and also tried the power management solution but no luck.  
Limited wi-fi connectivity drop