Hello Staticguy, and thanks for your reply, I'm afraid the situation has become more complicated now as I did a Windows XP restore back to three days ago, and Avast now tells me my Pro trial period has ended, but I wasn't on a trial period or Pro, but rather the Avast Free version.
To try sorting this I did a restore reversal but it still tells me I'm at the end of a trial Pro version, and I don't know how to get back.
Any info appreciated.
Bizet