If you deleted Driver Store, get it back. Not that I think it helps, but here's Co-Pilot answer:
"Failed to import driver package into Driver Store" error can be fixed by selecting "Import the driver and append a new catalog to the existing categories" for Specify the option for duplicate drivers in Import New Driver Wizard. If the INF file references a file that is not included in the driver package, the driver package is not copied to the store. The process of copying a driver package to the Driver Store is called staging. A driver package must be staged to the Driver Store before the package can be used to install any devices.