In reply to pec:
Thanks for the replies. I'll probably go with the built in microsoft stuff at first and see how it goes. Presumably it won't cause the computer to grind to a halt like AVG does.
Re Malwarebytes, do you use this to find things if you think your computer might have an infection that got through the system and can this run in addition to the microsoft stuff unlike firewalls where you can't have two?
Finally, lots of people seem to rate Firefox or Chrome over IE. I've tried Firefox recently and haven't found it any better than IE, just a bit different. What am I missing here?
Thanks again.