Many issues with running

Hi! I tried many times just to start up live system, and when I finally did this I found a lot of issues. First of all, it does not matter how do I write image to USB and which image I choose (x64 x32), stable release or nightly builds… It only starts up when I disable UEFI boot in BIOS. When I started up system from USB I was able to install it or live boot, but live boot option never worked. So I installed system to another USB and sometimes it works. If i don’t shutdown or restart system manually USB brokes up, and even when I play Mario Bros (;-:wink: for a while system hangs up… My specs i7 6700 HQ GTX 965M Clevo motherboard