Then I started running through all kinds of fixes.
- Earlier drivers do not work. None (due to gpu not being found).
- Microsoft update cannot find updates to "3D Video Controller". Uninstalling it does nothing, it just re-appears.
- System restore is also out, since for some reason, there are no restore points.
(Did not run DDU in safe-mode.)
Laptop: Dell Inspiron 15 (3542)
Windows 8.1 (re-installed in normal bios instead of UEFI)
Dedicated GPU: Nvidia Geforce 820M