DavidR:

I really did not ask my question properly or clearly, but you answered it anyway. What I wanted to know was if ashquick.exe automatically gave me the most up to date scan, and I understand from your answer that it does, and I am not too concerned by how long it takes, as long as I am well protected.

Thanks to you all for replying so quickly. I have been very impressed with AVAST so far, and the forum helps me to learn.