To all you lovely people who tried to help me. EUREKA! Problem solved. I slept on it and this morning cancelled golf (It was raining in any case) and worked on my machine. I discovered that as part of BT/Yahoo Broadband package that there was another Firewall on my machine, one I knew nothing about, provided by Symantec/Norton. I went to add/remove and removed that part of the package. AVAST then updated it’s virus prog silently until eventually I had the mellow tones of ‘Updated’. I now have an up to date virus checker courtesy of AVAST and feel much more secure. I have also enabled the Win XP Home firewall and included AVAST in the exeptions. Thank you all once again for your very considerable help and support. Jandap