I am new here so please forgive me….I am not very good at all with the tech talk, I have a Dual DVDRW Liteon SHOW-16335….I can play burned off movies on it and play music cd`s…and it will read a data cd-r…But when I try to watch a store bought DVD movie it will not even show up in the drive…I have a few DVD`s with programs they will not open…I need to get into them…..And my second problem is when I try to boot up into the BIO`s it will not go….I had 6 trojan`s on my computer and got rid of them….Could this of been what started my problem….I want to Thank You All for your time….