Thanks for the input chaps.
I've been pleased with Adobe, but yes, the time may well be right for a change.
I'm very interested in getting to grips with all aspects of Kindle, as years of work on a book are nearing an end. I use Kindle for PC, but that's as far as I've got.
The Rivetess' computer is chugging along after setting it back to the 22nd of Feb, and I hope we will both be on W7 on our laptops soon, so not too bothered - unless there is a Nasty lurking.
We use Security Essentials on these and the two PCs. Right now, nothing else. But that's (yet) another issue.