Windows 2000 Pro has suddenly stopped recognsing both
cd_rom and cd writer drives. Drive manager give an error
31 code, and there is an exclamation mark beside both
drives. They are both on the secondary IDE controller,
and have worked for years. I have uninstalled both
several times to no avail, and on boot up the system
recognizes them but Win dows does not. Their drive
letters are 'P' and 'Q'.

Try the fixes listed here.

Cannot Access CD-ROM and "Code 31" Error Message in Device Manager After
You Remove Adaptec Easy CD Creator from Your Computer
http://support.microsoft.com/default...b;en-us;270008


George DeLeon wrote:

> Windows 2000 Pro has suddenly stopped recognsing both
> cd_rom and cd writer drives. Drive manager give an error
> 31 code, and there is an exclamation mark beside both
> drives. They are both on the secondary IDE controller,
> and have worked for years. I have uninstalled both
> several times to no avail, and on boot up the system
> recognizes them but Win dows does not. Their drive
> letters are 'P' and 'Q'.
>