I googled it up but didn't find the solution so tried and figured it out by myself (that drive is a real pain in the ***). Here we go:
1. Open regedit
2. Search "MagicISO" and delete any key containing it
3. Search "PNPA000" and do the same as above.
4. Search "ZC855" and do the same but, when you get to the key "Cdrom\Enum\ change the value of Count and of Nextinstance reducing its value by one after deleting the ZC855 on the right (that's the drive of MagicISO)
If you get any messages that you're not allowed to delete any key just right click and go to permissions, then select full control and press ok. After that you should be able to delete it without any problem.
That worked for me. Hope it works for you too.
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