Thanks to this forum, I overcame my initial problem of being unable to access localhost. This was achieved by un-installing AVG.
I can now access localhost and get the WampServer page.
However, when I try to access phpMyAdmin I get a small area of symbols headed by db4 on the upepr left of my screen. Followed shorty by 'Apache HTTP Server has encountered a problem and needs to close.'
Forum:
WampServer English