Thanks goates,
I've looked at what was happening at the time of the hit and it looks like the culprit was a *.
js file - Java script. I run IE with Java disabled but unfortunately, disabling Java doesn't seem to be a defence.
As to switching browsers, I still think that using a Microsoft machine on the internet is no longer an option and I have an old P2 desktop that's not doing much. In future I'll convert it to Linux and use that one for internet work and keep the laptop off-line for private use.
I was playing with some splendid Mac machines last month when I was on UK leave - I especially liked the futuristic 24 inch wide screen model that even a blind old bat like me can see clearly. The quality just stands out, even in the graphics. I guess the future is predicted in that old addage -
with an Apple you may, keep PC Doctor away.
