I downloaded NirLauncher 1.17.18. It downloads as a Zip file. The Zip file contains a bunch of utilities from NirSoft. I ran a BD W8 Security contextual scan by right clicking the Zip file locating the Bitdender line item in Windows Explorer. The scan identified a number of items as malicious. I chose to Cancel or clicked on the "x" on the top right of the GUI. I can't remember which. Whether I should have let Bitdefender take an action rather than clicking on Cancel or closing the GUI is besides the point here. That was my choice. I then deleted the Zip file and cleaned the Recycle bin.
I then right clicked on an executable file and the line item for the BD W8 Security contextual scan in Windows Explorer was gone. I retarted W8 and it returned.
The point of all of this is not whether I should have let BD W8 Security complete the operation of quarantining or deleting the items it found as being malicious.
The point is that when I cancelled the scan or closed the GUI by clicking on the "X" the option to run the BD W8 Security contexctual scan from Windows Explorer was no longer available. I did open Bitdefender and the main GUI indicated everything was okay. This should be looked at by Bitdefender to see if they can duplicate.
Thanks for reading