Malware hides folders on external drives.

Hello,

I've contracted the "Hidden Folders" malware. It only affects my external drives. I ran unhide.exe to no avail, I tried a registry fix mentioned on MS support, and I tried running attrib -h -r -s /s /d j:\*.*

On the last one, it came back with 3 lines of messages, all saying Access denied: J:$Recycle.Bin yadda yadda yadda

Any idea what I can try next?

Thanks

Tedski