Today BitDefender had a huge false positive, when the 64bit version managed to detect many system files and Microsoft Office executables as Trojan.FakeAlert.5. If that isn’t enough, there are reports that even it’s own files are detected.

The official answer is:

“The problem is only affecting users of the x64 versions of BitDefender.
A fix will be delivered via automatic updates as soon as possible.
Please disable the real time scanning feature until further notice.
We are sorry for the inconvenience.”

Please keep in mind that this issue might affect other antivirus products that are using the BitDefender engine (F-Secure, G-Data, BullGuard, Hauri, etc).