On a few of my servers I have elected to install the full SEP stack. Most of the servers I have elected to install everything on are really low impact servers (terminal servers, rarely used application servers, etc.). One of our Application servers is heavily used, but from what we've observed up until yesterday is that the full SEP stack has little to no impact on it. Then suddenly yesterday, the network capabilities of the application server came to it's knees. No big deal, uninstalled SEP full stack and just installed A/V capabilities (removed NPS and Proactive protection, anything that might be using teefer.sys) and everything is back to normal. I thought it was strange that all the sudden SEP started causing issues like that out of the blue, but I don't really have a lot of time to fully delve into the situation so I moved on.
So fast forward today, and now I have a terminal server exhibiting the same issues. I disabled SEP and all performance issues seem to have gone away. I was looking through the NPS updates and it looks like I just recently recieved the August 13th definition set. Has anyone else noticed any sort of performance issues recently?
Currently running 12.1.4013 on all servers and workstations.