This is what it is, Clive:
FILENAME: Dwwin.exe.
PROGRAM NAME: Dr. Watson.
DESCRIPTION: Microsoft application error-reporting tool, which gathers data about malfunctioning software and can send it to Microsoft.
RECOMMENDED ACTION: Permit once to transmit this information.
Sounds like maybe you've blocked it with ZA? Can't explain why it should want to transmit though. Have you had any other problems? Perhaps Norton Utilities might have an answer?