Render stops halfway without any reason

Hello. I have a very, very big problem. I tried to fix it a whole week until now and I need some help from proffeccionals.

Let's move on: When I trying to export any file, render just stops in one moment without reason. I'm already tried to render 10 sec video without effects and render stops here too. I'm reinstalled AE 4 times and use latest version of it. That doesn't help. I reinstalled a Windows with formatting every disk, doesn't help. I've checked every render log. Nothing. I've downloaded Quicktime and render in that format. Doesn't help. I cleared every cache folder and gave it 50 gb memory. Doesn't help. My computer specs are low, but I think that isn't a reason to just stopping render halfway.

Specs:
GTX 760 (2 gb)
Xeon e5450 2.6 ghz
4 gb RAM DDR2 800 
SSD 40 gb free\70 gb
HDD 800gb full free
Windows 10 2004