I just bought a brand new dell latitude 3540 about April or May this year, and my dvd burner just stopped reading on windows7 ... someone said if I upgraded my OS to windows8 it might solve the issue as that solved theirs but if I do that I may loose my 1 year McAfee antivirus license ... the icon stopped showing in the My Computer page...but when I shutdown and re start, hibernate then re start or restart the system the dvd burner icon comes back on and when I right click and tap eject the tray pops out the I get an error message saying an error occurred while ejecting disk then the dvd icon disappears... before all this the dvd burner could not read discs without me having to first restart the system...now it does not read any disks at all and the light on the tray does not blink at all again... please what could be the problem and where can I get a replacement to buy? Thanks