I bought new PC yesterday and everything was working fine. I installed Windows 7, applications and two games. This morning I wanted to burn some files but Nero and Power ISO showed Error! Later,after I uninstalled Nero, my computer didn't see DVD writer at all! And when I enter BIOS Boot Management I can't switch 1st Boot Sequence to DVD, it just shows my hard drive....Nor I can 'enable' IDE Primary master and slave....I have no idea what's wrong,yesterday it worked perfectly and I haven't done anything to it to mess it up this much....I think that maybe my DVD writer 'died'....It should be Samsung but I don't see 'Samsung' written anywhere and I can't open computer because of the guarantee....HELP!