By mistake this morning, I was going to dow...

By mistake this morning, I was going to download some pics off a digital camera and plugged it into the USB port. I don't know what I was thinking, but I went to the control panel and selected scanners & cameras and chose to ''add new hardware.'' It thinks I have added a ''USB pc camera (SN9C103)'' and it keeps rebooting and rebooting. I have unplugged the camera and it still keeps happening and coming up that I have added this new hardware. I have tried the F8 key on opening and it won't do that either. I was going to try opening it in ''safe mode'' but I can't get that screen to come up. HELP, please, I'm desperate! Thanks! Patty