Reboot Loops since SEP 12.1.5 install

Hello,

We recently upgraded from a mixed environment of 11.x and 12.x SEP clients, to a fixed SEP 12.1.5 environent. Since then, we are seeing multiple cases where the PC reboots 60 seconds after the windows logon screen is reached, whether or not we logon.

The windows system logs state that the  DCOM server process launcher service terminated unexpectedly and or Plug and Play service terminated unexpectedly, resulting in windows automatically restarting the PC.

Any suggestions on where to start?