Hi, Andrea and JaySarah,
Success has crowned my efforts - I think ! And it's not too difficult.
1 Start your computer in 'Safe Mode' - hold down F8 while you hit the start button and until the computer starts to run.
2 Choose 'Safe Mode' from the choice screen and let the computer boot itself.
3 Once its up and running, RIGHT click on the Start button and then click on 'Open'
4 This seems to open in 'Programs' and you need to navigate to 'Program Files' . Do this by using the 'Ctrl' and 'Up Arrow' keys until you come to 'System (C:)' ; then click on this, scroll down if necessary and click on 'Program Files'
5 You will see a folder called 'PersonalAV' . Click on this and you will see it contains one file called 'PAV.exe' .
6 Click on 'PAV.exe' and then RIGHT click on it. A contextual menu will appear - go down to almost the bottom and choose 'Rename' .
7 In Vista you will need to go back and select the whole file name, including the extension '.exe' , then type in a new name. I called it 'NotPAV.old' but anything will do. You will also have to say 'Yes' in all the boxes that warn that changing extensions may stop files working. That's what you want to do, isn't it ?
8 Close the 'open' box you have been working in and re-boot your computer - and PersonalAV should no longer be bothering you.
9 You can now delete this file by repeating steps 4, 5 and 6 but this time clicking on 'Delete' instead of 'Rename' and saying yes at all the confirmation boxes that turn up. It's gone !
Hope this helps, and if anybody knows a better method, feel free to tell us about it.
By the bye, is this piece of malware a woman thing ? It just happens that the laptop I have just removed it from belongs to a woman too.