Hello, and thank you or replying. My Windows 7 is a fresh one, i tried scanning my OS with various anti-virus software, none have found any kind of threat.
That's what MTADiag gave me https://pastebin.mtasa.com/411111643
I would like to add also that i copied my whole GTA directory with MTA inside to the laptop of my flatmate (we use the same internet) and it works for him perfectly. It appears like it might be a problem with my OS rather than the internet provider or MTA, maybe?