First, exactly what version of BitDefender is installed?
Second, you will have to be logged in to your Mac as an Admin.
Third, even then, if you try to delete/move/rename an item in the System or main Library, you will be asked for your Admin password. If the item is actually a part of the OS, you may have to resort to Terminal.
Fourth, you must be absolutely positive you know what you are trying to delete.
Please tell us exactly the path you are using, ie; HD/System/Library/Extensions/ABadItem.kext or
HD/Library/Application Support/ClamXAV/Quarantine/
You don't need to even try removing anything just give us a list of items (and the directory they are in, the whole path would be even better) that you think should be moved.
As for
Activity
Monitor, it does not delete things. It can only stop it from running, for a time. How long the item remains stopped depends on several things.
- It may be controlled by a daemon or launch agent that monitors whether or not that item is running. If that agent detects that the item has stopped, it will simply restart it.
- If the item automatically starts whenever the Mac Starts or Restarts, then that item will be running again, the next time you start up.
- The item may be monitored by another part of the main program (BitDefender, for example). Therefore, the main program will simply restart the item. That might not be immediately, it could be several minutes or longer.
The point is deleting stuff is not the job of
Activity
Monitor. Nor does
AM even show you every single item/app/agent/kernel/etc. that is operating/running.
Persistent apps like BD require slow, purposeful, detailed, calculated steps to remove. If you don't have the patience to find all the pertinent files/items before starting the job of removing them, don't even think about doing that task yourself. It will be well worth the cost to have someone else do it.