For what it\'s worth, I agree with Gem. I recently switched to avast! home edition (recommended by Henry above) from AVG because AVG was requiring computer restarts too frquently.. (otherwise was satisfied with it). BUT no matter which one I run the settings are the same. Nothing automatic, manual updates twice daily, C: drive scan whenever update received, full scan only rarely & when computer not too busy with anything else.
Like Gem said, they are constantly checking (heuristics) in the background so automatic daily full scans would be overkill and slow computer down.. :shock: