DVDs have stopped working very suddenly. The DVD driver is recognised on "My Computer" and in Devices Manager it says that it is working properly, but the DVD itself is not recognised and will not play in media player or vlc. When I put a disc in, scanning noises continue for a very long time, then the DVD is ejected. I have tried uninstalling and reinstalling the driver, cleaning the lens and rebooting, but nothing has worked. Thanks for any help.