Wallaby, I started having the same problem last night. I have the same version as you. Everything else seems to be working ok, though. What was weird was when I fired up my PC after coming home from work and signed in, I had a message from Nod32 stating that I was signed in under a temporary profile, and whatever files generated would be deleted upon my leaving. They also said to try back a little later and see if I could sign in to my real account. This prompted me to reboot and sign in again, at which time I got my real profile back. I checked my Nod32 thoroughly, and found the problem you described. I used Task Manager to try and end it, and got the spinning hurricane thingy for about 15 minutes before getting a prompt from Nod asking if I wanted to exit. I exited, and restored the computer to 2 days ago. That did nothing, as the problem persisted and continues as we speak. Nice to hear I am not the only one experiencing this, which suggests a system wide problem.