Just the regular programms, running in the background. Nothing to special and none of them interfered for the last years on battle.net with the game.
Steam
Kaspersky Internet Security (Anti Virus protection software)
Logitech Gaming Suite (This is my mouse and headphone software)
ROCCAT Swarm (That my keyboard software)
NVidia Panel (Regular graphic card software)
That's it. So, nothing special.
I never used any sorts of cheating software or what so ever.
This is why I am really so currious about that problem.