Well maybe having a bad PC might just be the problem, but try joining a new server, some of them can be laggy than others depending where you are. If you need help getting a good connection just look at the Ping (at the top of the server list). Go for the lowest ping (and a server that you'd prefer: Hardcore, many players, etc.) and see if that helps. If not then it's either the game files or your PC. Hope this helps a bit.

Does it say Battleye update failed? Because if it does, go to your Steam game library, right-click DayZ, then go to properties and proceed to Local files. Click the option ''Verify intergrity of game cache''. I had the same problem and did this. I hope it helps.

Agreed, be better if you can find some in the forests aswell.

I had a similar problem where it was always on even if i joined a new server. I fixed it by pressing the chat key (for typing) or restart the whole game.