I haven't had a BSOD for a couple of days now

After implementing these fixes I would like to share some hints:
  • When rolling back your Nvidia driver, make sure that Windows does not update to the latest drivers sneakily in the background by changing your Windows Update settings.
  • I suspect that LGBusEnum.sys is the culprit. I have removed this driver, but it reappeared after installing the Logitech G930 software. Shortly afterwards my machine crashed...... I then removed the file manually and since then had no issues with BSOD's. The headset seems to be working fine as well.
  • Finally but, not least Anshad Edavana is the real deal!!! Thanks Anshad for your help!