enter you bios area when you switch on will be F2 or DEL. please then goto the exit menu and choose load bios defaults or load optimised defaults. F10 save changes and exit.
install the codec pack
make sure no other webcam s.w is running. turn on your webcam via fn key - USe the webcam test tool (not youcam) while testing this
1.Click Start , type Device Manager , and select Device Manager from the list provided.
2.Double-click Imaging Devices to expand the list - what is listed there?