Error eliminating Suspicious.Cloud.9

Since yesterday Norton has been warning me about a Suspicious.Cloud.9 in the DVD/CD in I:\. There are two problems with this. First, it states that there has been an error in the deletion  and that I have to remove de CD/DVD and do the scan again; this leads me to the second problem. I use MagiDisc to mount CD images. I unmounted the image in I:\, ran the scan again and got the same alert. Deleted the I:\ "emulator", still the same alert. I ran the Power Eraser, but it didn't find anything. Right now I'm running a full scan, but probably it will display the same alert. What do I do to remove this threat?