The cdrom service is stopped with an exit code of 31 (0x1f) which would indicate "A device attached to the system is not functioning".
I would take that to be the cd drive itself and I still suspect the issue may be with the SATA controller driver.
The drive may work OK with Windows 7 but not Windows 8.1.
Have you checked for a BIOS update?
Also, you may want to go ahead and try the Windows 7 Intel Rapid Storage driver available from Samsung and see if it works any better.
Hi
Frustrating then as both laptops were bought with windows 8 on them and cd drive worked fine for first 18 months so if now needs to work only with windows 7 driver does sound odd.
How do I check for bios updates please?
thanks