DELL XPS 400/9150 - OS: Windows XP

The drivers for both DVD/CD ROM's (HL-DT-ST DVD+- RW GWA4164B and HL-DT-ST DVD-ROM GDR8164B) are suddenly not operational.

I see a yellow question mark before each CD/ROM under Device Manager. The device status (in Device manager) is "Windows cannot load the device driver for this hardware. The driver may be corrupted or missing. (Code 39)". The driver version for both CD/ROM's is 5.1.2535.0

Since I can not use either CD/ROM, I can not use the DELL DVD/ROM to re-install the driver(s). Please help!

Can you please tell me how to download the drivers in order for the CD/ROM's to work again.

Thank you.