Thank you all for the warm welcome and invaluable advice - it certainly has given me a sound and tried base to form a shortlist. As with all things I find it more reassuring to base a decision on user experience rather than professional review / evaluation which I believe in my paranoid mind can be swayed / biased. It looks like Avira free may be the smoothest switch although I will probably demo both Avira and Avast - not at the same time You know it sounds kinda daft and obvious now but the best bet is to try a number of options out (after all they are free) as all users machines vary in someway whether it be the spec of processor, memory, drive(s), the operating system, software / apps running on. Equally users bias of protection will vary as some prefer ease of use, speed of scan, frequency of update. Thanks again Mortimer