My Wacom Intuos pen tablet (CTH-680) wasn't working so I downloaded and installed the driver for it from Wacom. The computer needed to restart for the installation to be complete. When it turned back on, neither my tablet, mouse, nor keyboard was working. I tried unplugging the tablet and plugging the mouse and keyboard into different USB ports and restarting the computer again, but nothing. I just get to my Windows 10 sign-in screen, but I have no way to sign in. I can't even access the BIOS setup. Help?!