Ok - Found it, but try the above suggestion first as changing the registry can always be problematic.
If you do have to edit the registry - do a backup of it first so you can revert back to it if you have to.
Read the entire MS page first. Some of the other cures may be applicable and preferable to altering the registry.
Method 1: Remove the registry entry
WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.
1. Click Start, and then click Run.
2. In the Open box, type regedit, and then click OK.
3. Locate and then click the following registry subkey:
HKEY_LOCAL_MACHINE/System/CurrentControlSet/Control/Class/{4d36e965-e325-11ce-bfc1-08002be10318}
4. On the File menu, click Export.
5. In the File name box, type savedkey, and then click Save.
6.
Click the REG_MULTI_SZ data type UpperFilters, and then click Delete on the Edit menu. When you are prompted to confirm the deletion, click Yes.Note If this data type is missing, go to Method 2.
7.
Click the REG_MULTI_SZ data type LowerFilters, and then click Delete on the Edit menu. When you are prompted to confirm the deletion, click Yes.8. Quit Registry Editor, and then restart the computer.
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Method 2: Replace the existing driver
1. Click Start, and then click Control Panel.
2. If Control Panel is in Category view, click Performance and Maintenance, and then click System.
If Control Panel is in Classic view, double-click System.
3. On the Hardware tab, click Device Manager.
4. Click the drive with the question mark next to it.
5. On the Action menu, click Uninstall. When you are prompted to confirm the removal, click OK.
6. Repeat steps 4 through 5 for any other drives with question marks.
7. On the Action menu, click Scan for hardware changes.
Note If Windows XP cannot locate the driver for your device, the device may not be supported by Windows XP. To see the list of supported devices, see the most recent Windows Hardware Compatibility List (HCL) at the following Microsoft Web site:
http://www.microsoft.com/whdc/hcl/default.mspx (http://www.microsoft.com/whdc/hcl/default.mspx)
Although Microsoft does not encourage the use of devices that are not on the Hardware Compatibility List, sometimes you can obtain a Windows XP-compatible driver by contacting the device manufacturer directly. For information about how to contact your hardware manufacturer, click the appropriate article number in the following list to view the article in the Microsoft Knowledge Base:
65416 (http://support.microsoft.com/kb/65416/) Hardware and Software Third-Party Vendor Contact List, A-K
60781 (http://support.microsoft.com/kb/60781/) Hardware and Software Third-Party Vendor Contact List, L-P
60782 (http://support.microsoft.com/kb/60782/) Hardware and Software Third-Party Vendor Contact List, Q-Z
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MORE INFORMATION
For additional information about other problems with CD-ROM and DVD-ROM drives in Windows XP, click the following article numbers to view the articles in the Microsoft Knowledge Base:
314060 (http://support.microsoft.com/kb/314060/) CD-ROM access is missing and messages cite error Code 31, Code 32, Code 19, or Code 39 after you remove Easy CD Creator in Windows XP
315350 (http://support.microsoft.com/kb/315350/) "Incorrect function" error message when you access the CD-ROM drive, the DVD-ROM drive, or the CD-RW drive
Microsoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information.
http://support.microsoft.com/kb/324129/en-usInstead of installing NEro or Roxio try the following freeware and see if it meets your needs. It seems to be less problematic.
http://www.deepburner.com/?r=products&pr=provsfree