Can anyone help with the problem i have with my Acer 7520 Laptop?I switched on the laptop and was prompted to insert a disc as the machine wanted to run a backup.I have done a backup before and it asked me to insert the previous disc which i did.The machine makes various "buzzing" noises as if reading the disc but eventually tells me there is no disc. It also asks me to insert a new disc if you do not want to write to the disc previously used. I tried this also but it said there was no disc. I have also tried a dvd movie but it won`t read this either.The laptop has Vista Home Premium pre-installed and is also still in warranty but don`t want to return it just yet as the usual Christmas post situation is terrible and it might be something very simple?I have some knowledge of computers (not vast!)and had a look in device manager and there did not seem to be any problem.Only thing i saw was that the DvD had not been set for any specific country and i assumed it was left this way so it would be able to accept any region?.Any advice would be gratefully accepted.