So i started few days ago once again after the updates came out. I see that the game lags hell a lot for me, didn't have any problems before.
Is it because i upgraded my windows 7 to 10 or is this common?

Spyware bundled with windows 10 prob slowing your internet connection down. I recommend not being spied on. I also recommend not beta testing new releasing of windows. They are all basically shit until they have been a year or 2.