DVD stopped working on my Dell XPS 420

The DVD-R drive stopped working on my Dell XPS 420 a couple of days ago. I'm assuming this was caused by a Windows Vista update (only change that has occured on my system recently and is in the same time frame that the DVD drive stopped working).

I went to the "Computer->manage->event viewer->Summary of Administrative events->error" window and a recent (last day or so) error is listed numerous times as a "Service Control Manager Eventlog Provider" error # 7026 (again, I am assuming this is related to losing my DVD drive because of the "cdrom" field in the error message:

Log Name:      System
Source:        Service Control Manager
Date:          3/13/2009 11:41:28 PM
Event ID:      7026
Task Category: None
Level:         Error
Keywords:      Classic
User:          N/A
Computer:      xxxxxxx
Description:
The following boot-start or system-start driver(s) failed to load:
cdrom
Event Xml:

 
   
    7026
    0
    2
    0
    0
    0x80000000000000
   
    107089
   
   
    System
    Robot-PC
   
 
 
   
cdrom
 

Anyone have any ideas on how I can get my DVD drive working again (it no longer appears in the Vista Computer folder, forgot to mention that) ?