Too much virtual drives (don't know how to remove them)

I have win xp pro sp2 and I have realised that I currently have 4 virtual drives even though i only activated 2 virtual drives in Daemon tool. I really don’t know where the 2 other drives are coming from, they have the same name as the others but I really don’t know how to remove them. If I try to remoe them in the devices manager, they come back after a reboot. They are not alcohol 120% drives.
Could anyone help me ?
Thx a lot :D.

go to virtual cd/dvd rom and set number of virtual drives

Yes but it’s already set to 2 drives hehe, that’s why I’m asking where they (the 2 extra drives because in total i have 4 virtual drives) could well be coming from and how to remove them.