Ssd (with Windows) not in boot options

Nov 15, 2018
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After switching PSU, the PC wont detect the ssd (Windows disc) on startup. Just enters the BIOS with this error:

The current BIOS setting do not fully support the boot device.
Click OK to enter the BIOS setup.

Go to Andvanced > boot > CSM parameters and adjust the CSM settings to enable the boot device.

I have tried resetting BIOS and switche cables. Used the whole day on this, I am giving up