I have to pay tribute to Kaspersky.
After scanning 2 disks, f-secure found 4 files it flagged as dangerous, but it was unable to remove them. I tried with NPE and it flagged the same files but failed to remove them, then I ran kvrt, it found the same files and removed them. My alternative was to remove them manually, but I wanted to see who could do it and Kaspersky won this time.