Error code 40

CM_PROB_DRIVER_SERVICE_KEY_INVALID
Windows cannot access this hardware because its service key information in the registry is missing or recorded incorrectly. (Code 40)

Cause

Information in the registry service key for the driver is invalid.

Solution

Install another driver using device control. You'll be asked to choose which driver you want to install. Driver Fusion includes your backed up drivers, the drivers that are present in Windows, and the drivers that we have online. You can also reinstall your current driver.

If you still have the same error, uninstall the device using device control and then scan your computer for hardware changes.