Hello,
I just can't take it anymore. Too many problems.
Unfortunately, I have deleted the BitDefender from my computer.
I downloaded a trial of Avira Internet Security 2012.
Already my computer problems have gone away.
Computer is booting up like it should.
No more mouse and keyboard problems.
Video and Audio cards are working.
System Tray is not hanging up.
I am sorry to say this, but there's the proof.
The problem was BitDefender.
I wasted my money and I am sadly disappointed.
Happy Holidays to everyone!
Farewell!