Having searched high and low for a solution to the above problem I found the following fix kindly posted by someone far more computer savvy than myself.
I regret I cannot give the credit to the original publisher as I cannot find the post again but I did write the fix down, so I am re-posting it here and hopefully it will work for others with the same problem.
It sorted my Matshita dvd-ram and also a Lite On portable drive for me.
Right-click the Start button > Command Prompt (Admin) and type
reg.exe add "HKLM\System\CurrentControlSet\Services\atapi\Controller0" /f /v EnumDevice1 /t REG_DWORD /d 0x00000001
hit enter
Reboot computer
Good Luck I am delighted to have DVD capability again and thanks to the original poster.
I regret I cannot give the credit to the original publisher as I cannot find the post again but I did write the fix down, so I am re-posting it here and hopefully it will work for others with the same problem.
It sorted my Matshita dvd-ram and also a Lite On portable drive for me.
Right-click the Start button > Command Prompt (Admin) and type
reg.exe add "HKLM\System\CurrentControlSet\Services\atapi\Controller0" /f /v EnumDevice1 /t REG_DWORD /d 0x00000001
hit enter
Reboot computer
Good Luck I am delighted to have DVD capability again and thanks to the original poster.