Guys please help me in this case. I have got no response from deserted Bitdefender forum. I am using BD trial and have decided to buy it. It improved a lot from 2009 version in terms of resource usage. But it gives me an alert Bitdefender Security Service has encountered a critical error..!! I have in realtime Prevx SafeOnline Facebook, SAS pro and Winpatrol Plus. This nag screen is bothering me a number of times a day. This is my last hope of getting help before going back to free Avast 5.