Try removing the drives in Device Manager, shut down then reboot.
Or move the drives around on your IDE channels (and the master or slave) (IRQ's?).
Better still get rid of the web cam...............why use something that you know causes problems?
Last good configuration is a ONE SHOT only method of repair, its just a copy of the config of the previous boot, so if something was wrong on the previous boot (the saved 'last good config' becomes 'last crap config') it won't work!!