Thanks both!
I have bought it and the 1st thing I put on was AVG free ! It's my favourite, and I feel I understand it a bit- had it on the old PC and never a problem.
Now got to be brave and delete the macafee that is also i think running and slowing it up.
I'm not feeling any window 8 lurve though yet, despite being very android and ipad competent so very into apps. I guess I'll get used to it...
Annoyed microsoft have fallen out with google so my preferred google sync based set up was tricky to get going, and google drive folder isn't supported at all- have to do it all on line- grr!!
Next challenge migrating itunes... I'll ask about that separately!