This intruder in Program Files/Common Files/Authentium, with an associated service called DvpApi, is a beast. It can be deleted in Safe Mode but always reinstates itself. I found a thread in this forum, January 2007, ~e5.001, which included from TimW a detailed removal procedure. I tried this, but none of the system scan items and none of the clipboard items to be deleted from Killbox were there, and it does not appear in Add/Remove Programs. Perhaps it has been updated! Can any expert help?