The update processed successfully and showed after I restarted the machine. The problem does not appear to be fixed, as I attempted to update the program afterwards and that gave me the same error as it did with the virus definition update attempts (this is a different machine from the one previously listed, one with an older program version, but on the same network).

http://img834.imageshack.us/img834/7742/avaster02.png

http://img163.imageshack.us/img163/6839/avaster01.png