[Online multiplayer games cannot connect to servers ever since Kaspersky Security Cloud updated to Kaspersky Plus]

I remember correctly when installing games you had to turn off window security, and then they won't disconnect anymore, you should try it again, but it can still happen, you can try other online games see how. I usually install izigames and don't get any errors.

[Kaspersky Internet Security Blocking Access for Programs/Games]

i think maybe it's your browser, try resetting it, i use it for online games seems to have no problems. Occasionally some games get disconnected.

[Online multiplayer games cannot connect to servers ever since Kaspersky Security Cloud updated to Kaspersky Plus]

I remember correctly when installing games you had to turn off window security, and then they won't disconnect anymore, you should try it again, but it can still happen, you can try other online games see how.