Ubuntu hanging easily and frequently

It all started when i wanted to install Ubuntu Mate (16.04.1) x64, in dual boot (next to Win 10 64bit), installed just fine although kinda slow (like 1 hour or more) and ran fine while in a live environment (also in virtualbox), but after first boot-up within like 1 minute everything slowed to a crawl, took 10 seconds for the right click menu to appear, took 30 minutes to install Grub Customizer (so i could get back to windows), next reboot in quickly started the system monitor, nothing out of the ordinary, CPU barely used, ram usage below 1GB (my PC has 16GB), swap not used at all.

So i tried a different distro, KDE Neon User LTS edition, same problem, so i tried switching my bios settings, went from IDE to AHCI and from Legacy to UEFI (this meant i had to reinstall windows too, so while i was at it i also switched from MBR to GPT on both drives)

Then i tried reinstalling Ubuntu Mate, seems to have helped a little, then i tried Kubuntu 16.10, that had all sorts of issues, first boot didn't even complete, after restart it worked but had all sort of graphical glitches, broken images, animations, installed nvidia proprietary graphics drivers, didn't help at all.

So basically it seems like anything ubuntu based just can't run on my system, so i decided to try non-ubuntu based distros, like Manjaro Deepin 16.3, that wouldn't get passed the boot menu (i hear that means it's not UEFI compatible), then i decided to try Gecko Linux (based on OpenSuse Leap 42.2), that installed in under 5 minutes, but i couldn't get it to boot, not even with the help of it's creator, we tried everything. I have downloaded but yet to try Fedora 25.

Yesterday Ubuntu 16.04.2 came out so i decided to try that, and it seems some progress has been done, now it's almost usable, it only locks up/hangs while i'm trying to do something a bit more demanding than a menu and it works for more than 1 minute too, i managed to update everything, switched to nvidia drivers, nothing helped.

I can play youtube videos, even managed to install Neverball and it runs fine, it's actually it's menus that gave me problems, every change(click) would interrupt the music, it's windows would go monochromatic and dark for 10 seconds to a few minutes.

On the 2nd reboot, Firefox wouldn't want to start, tried twice, so i ran System Monitor and firefox was in there (4 times), just not showing up, it probably would have shown up eventually, but after a while i just killed the tasks and rebooted.

This is also the first time an ubuntu (based) distro managed to install the bootloader properly (with Windows in it)

Also i don't know if this is a new feature or not, but isn't there supposed to be an Applications and a Places, dropdown/start menu like thing in the top left corner of the screen ? (in the top bar), it's missing on mine, reboots don't fix it.

Windows 10 is installed on an SSD and i'm trying to install Linux to a spare 1.5TB WD Caviar Green HDD i have. (a slow but healthy drive)
System specs: intel i7 3440 CPU, Asus P8H77-V LE mobo, 16GB of DDR3 RAM, nVidia Geforce GTX 960 4GB GPU, 1x120GB SSD (win), 1x1.5TB HDD (linux), 1x1TB, 2x2TB HDD's.

I really doubt it's a video driver issue, based on system monitor it's not a CPU driver issue either, but a hard drive issue won't cause a simple right click on the desktop to show up 15 seconds later either.

I already tried the linux forums, got very little help there, tried the ubuntu forums, nobody even looked at my thread in 7 days, hopefully i'll get some help here.