wiki

Into the Windows Device Manager, even if you check show hidden devices into the view, you won't see all hidden devices. To be able to clean the the devices that are no more present on the server, follow these steps, and delete all grayed devices (CPU, motherboard, disks…):

# cmd
# set DEVMGR_SHOW_NONPRESENT_DEVICES=1
# devmgmt.msc

Now into the Windows, go on –> View –> Show Hidden Devices

Be carefull: Don't delete devices into the category “Non-Plug and Play Drivers”, it contain kernel modules. It can affect you server if you delete something here.