Here you can learn about, how to block CD/DVD drive of any windows PC.
Follow these simple steps:
Block CD/DVD Drive:
1st way
Go here "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\CDRom"
Here you can see "Start" REG_DWORD having data 0x00000001 (1). This indicates that your CD/DVD drive is unlock. To block CD/DVD drive change "Start" value to 4 by double click on that. Now your CD/DVD drive is blocked. Re-start your PC if it doesn't work. To un-block CD/DVD Drive change value 4 to 1.There is another simple way to do this. Put all this in a batch file and run that.
2nd way
create a batch (.BAT) file and edit it with
reg add "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\CDRom" /f /v "Start" /t REG_DWORD /d "4"
To Un-Block CD/DVD drive change command with
reg add "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\CDRom" /f /v "Start" /t REG_DWORD /d "1"
This is very useful idea where there is security a major concern.