F-Secure Virus Descriptions : Iadhide
"IADHIDE is NOT a virus or a harmful program."
"We've added this description as we sometimes receive questions about existance of iadhide.dll or iadhide3.dll. These files are a standard part of the F-Secure Anti-Virus program."
"You can control the existance of iadhide.dll on your system by installing or removing the "F-Secure BackWeb" component. Please note that we do not recommend uninstalling BackWeb, as you won't be getting automatic updates any more. "