Are you seeing an issue with discrete graphics after disabling Optimus?
If you are seeing the following problem on your laptop, follow the solution guide below.
If you have disabled the integrated or UMA graphic in Device Manager > Display Adapters, to get better video performance. A yellow bang appears against the discrete graphic card with an error message like Windows has stopped this device because it has reported problems (Code 43). The external displays, if you have one installed, stop working simultaneously. If you shut down or restart the laptop, the fault continues.
Follow these steps:
Enable the integrated or UMA graphic from Device Manager > Display Adapters and then reboot as it can bring the laptop back to the previous working state.
Ensure that performance and power-saving optimization is set correctly.
For laptops with NVIDIA discrete graphics - Enable or Disable the Optimus option by pressing the F2 key and going into the BIOS setup > Video > Optimus.
For laptops with AMD discrete graphics - Select the option for Powersaving/Performance within the Control Panel > Catalyst Control Center(CCC) > Start.