Display Settings: %1!ws! (%2!d!) - any change crashes Win10 Settings. Also any attempt to change the desktop background crashes settings, with similar gobledegook in the dialogues. Laptop also will not turn off or sleep. Programs are running slowly or crash. I have updated all drivers to latest available on this service tag, and Win10 (1909) updates are all up to date. Laptop is about 2 weeks old.
Let's backup. When you first turned the XPS 13-7390 on, the Dell operating system image was decompressed and the PC restarted several times. At that point, how was the operating system?
Since then, what 3rd party software have you installed?
Disconnect all peripherals from the laptop except the power adapter connected to the left side TB3/USB Type-C port.
Does the Dell pre-Windows ePSA Hardware Diagnostics pass?