Server list lagg and battleye initialization failed

[stafwow 0]

Hello! I have a big issue regarding Dayz SA. my computer was slow so I reinstalled it from the root but I still have the same components in my computer. Earlier before I reinstalled the computer I could run Dayz Sa and all other dayz games and dayz lookalike(Steam games With server list) and now all suddenly I can play Dayz SA, Dayz Mod, etc. Because of lag, but I can play crisis 3 on ultra so I'm sure its not my graphic card and that my computer is slow.

 

Please help:S I have NSIS error on my computer now So  is it because of that?