No yellow exclamations. I tried this and it didn't work.
Follow these instructions to use the Toshiba Upper/Lower Limit Repair Tool to make the CD / DVD drive reappear in Windows Explorer (My Computer):
Click the following link to download the Toshiba Upper/Lower Limit Repair Tool (RmvFltrs.exe). Save the file to the Windows Desktop.
For Windows XP, double-click the file RmvFltrs.exe on the Windows Desktop to start the installation program.
For Windows Vista, right-click the RmvFltrs.exe file, and choose the "Run as Administrator" option. If a User Account Control dialog box displays the message, "An unidentified program wants access to your computer", click Allow.
Follow the onscreen prompts to complete the installation.
Restart the Computer.
Optionally, see Microsoft Knowledge Base article 314060 for additional information and detailed instructions for manually editing the Windows Registry to make the CD / DVD drive reappear in Windows Explorer (My Computer).