Can't get lite-on Burner to work

I have both:

SHW-160P6S and Sohr-5239v installed on my dell dimension 2400. After removing a virus both drives stopped working. I went to my registry like I was told before and Both upper and lower filters were not there. I downloaded both drivers again from the Lite on site and after trying to install the firmware ( flash ) it doesn’t recognize that I have the proper drives. Where am I going wrong here? I can’t even diagnose my lite on drives in the system Bios. HELP!!!