So, I have installed a few versions of Ubuntu, 14.04, 15.10, 16.04.After that I've installed Linux Mint 18.1 just to come back at Ubuntu 16.04(with every try dual-boot Windows 10).
The reason why I've been through all these versions is because I've had unstable and very slow wireless connection(about 15x slower in comparison with Windows 10) no matter the version. I've tried what seemed to be working for other users, even if my problem wasn't exactly the same. I even tried upgrading to kernel 4.10 but the problem is still there.
Something interesting is, while I have Ubuntu/Linux Mint installed, when I switch to Windows 10 I have the same issue as mentioned. If I remove Ubuntu/Linux Mint the problem goes away and everything is back to normal.
Here's my wireless-script result: http://pastebin.com/YCGr8Xc1
I may add the fact that Windows 10 and Ubuntu are installed on separate partitions.
Thanks in advance!