Users of BitDefender antivirus sortware for the 64-bit version of Windows have been encountering severe technical difficulties, as the security software is falsely identifying several Windows and BitDefender files as being infected with a Trojan.

BitDefender posted an update on its website acknowledging the flaw and offered resolution for users of its software.

We apologize for the issues that you are experiencing on behalf of the BitDefender update released today for Windows 64-bit systems.

The faulty update has been removed and we are quickly working on a fix for the issues experienced by the users that downloaded this update.Here is some background information on this problem:

Researchers with BitDefender are tracking the emergence of a new spate of phony overnight delivery notice attacks, calling out a set of threats currently in circulation that attempt to create backdoors that leave affected machines almost completely under the control of their assailants.