I recently moved to Ubuntu 14.04 from Windows 8.1. I have quite a problem with my WiFi speed dropping. When I checked it at speedtest.net it went from 30Mbps to less than 1Mbps then goes up again to about 18Mbps in just a few seconds. That's happening all the time making video calls impossible as well as streaming music and watching videos on YouTube. The problem is not existent in when running Windows. I have a "Integrated 10/100 BASE-T Ethernet LAN" with just the stock driver on a HP Pavilion 15. The power management of wlan0 is off. I have almost no knowledge of the terminal so if you help me please explain it like I'm a complete noob (which is true). Cheers!
lspci -vnn | grep Network
:08:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8188EE Wireless Network Adapter [10ec:8179] (rev 01)