when I play singelplayer everything is okay. But when I join a server (ping about 60) I start glitching around. I walk and it teleports me back, I reload and a few seconds later my weapon is empty again, I swich my weapon and the game switches back... A few seconds I joined, the ping goes up. Sometimes only to 200 somtimes up to 999.

What I have done so far:
-Disabled Avast
-Disabled Firewall
-Disabled Windows Defender

Nothing helped...

Graphics: GF 940M
Processor: I5 5200U

I sometimes have the same problem with Amarica's Army Proving Grounds.

I hope someone can help me.