I update, now my DVD drives don't work.

I am running Vista Ultimate 64Bit and use two LG DVD drives. I updated to version 3.0.20.320 and now the Microsoft driver cdrom.sys is unable to load stating that the driver is corrupt. I have replaced the driver four times now. The only thing that changed on my system was that I had updated Comodo and I am sure that some how this program is blocking the driver from loading successfully.

I have scanned my system with both my anti-virus and anti-spyware, and I know that my machine was working up until the point where I updated Comodo.

Is there any way to correct this, apart from removing Comodo?