I'm currently using BitDefender 2014 Total Security Trial Edition in Windows 8 64 bit with AMD C-70 processor on 2 GB DDR3.
My BitDefender is always in User Mode and whenever I try to change the mode to Autopilot, I get the following pop-up message.
"You switched to User Mode.
Tweaking critical product settings disabled autopilot. It no longer provides automatic protection for your pc."
I don't know which settings I manipulated, but I'm sure I didn't change that's so essential. 
What are the least settings that would allow me to switch to autopilot?
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Further I noticed a bug while I tried the same. 
When I click the autopilot icon to the right side of the user mode icon placed in the top-right corner of BitDefender Window,
it tries to switch to auto-pilot mode, and I notice the auto-pilot icon showing up as a sub-****** of BitDefender Tray icon.
And unusually, for every 2-3 seconds it switches between the two modes, autopilot and user mode, for a very long time
(after which it stops showing a crash report), giving me the "You switched to User Mode" pop-up notification every 4-6 seconds.
If unplugged I notice "You switched to Laptop mode" instead of that "You switched to User Mode" pop-up notification,
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and I could notice the auto-pilot symbol and Laptop-mode symbol toggling for every 2-3 seconds in the BitDefender Tray icon.
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I hope, answering the first question will help me relieve from the latter annoying notification.
Help me please, thanks in advance.