Do they show up by selecting unhide hidden devices, if they do show up, it means the cards have been removed before the drivers for them have been uninstalled. You have to plug each card in the same pci slot they were installed on, reboot and uninstall them via device manager before removing the sound cards. Hopefully that might eventually clear them all out. After removing any audio drivers from add/remove programs, the Realtek AC'97 Audio should be okay to remove and possibly the mpu401 device, not really sure about the others. Are they the onboard mobo sound drivers, if so they'll probably reinstall themselves on windows re-entry unless disabled in the bios ie: if you had onboard sound previously before installing the pci sound cards, they could be conflicting with each other which is why onboard sound should be disabled in bios before installing pci sound cards.