The nice man from the IT support centre has fixed it all.
I'm still not quite sure hoe the original infection happened as it seemed to be on the 2nd November when I was away in USA. It only started reproducing when I ran the SQL Query Analyser - which had been infected. I guess my disk was too open and that another machine infected it over the network. Anyway the PC is now clean and has the latest anti-virus software installed. Seems like today isa good day here :)))