how to remove trogan that blocks cd drive?

I have a trogan that has infected my cd drivers all of them. I can't download the antivirus from the cd because of this. But I don't want to buy more softwear, I just paid for this one. from a store, How do I remove or find out what the name of the trogan is? CD rom says not ready when I insert a cd in the driver. Says utilities drives blocked. any help on this matter?
I'm useing windows 98 se with two drives and a floppy none are working.