Character not responding

First of all: it's not fps/ms drops, i know how it looks when you have bad ping. In my case game keeps working perfectly fine for everyone except me. Everything around me keeps act like usual (minions, champion movement/ability usage, chat etc.) but i can't do a s**t. My character just freezes for 3-7 seconds. I can't move, can't use spells or items. I completely lose control of my character.

I have tried:

1. Restart game/computer
2. Restart router
3. Used Hextech Repair Tool with full game repair
4. I've deleted the game and reinstall it again

I don't have third-party firewall or anti-virus programs, only Windows Defender.

Here's a video: https://youtu.be/mZhE1diHhcg