Hi Andrew
There does seem to be a conflict between the recent update and Intel Optane
Open the old Control Panel, go to Programs and Features
You should see a specific Intel Optane Software Component. Uninstall the Optane software
Restart your PC
In maybe a months time, go to the support page for your system on the Dell website, then download and install Intel Optane, they should have resolved this bug at that time . . .