WAMPserver 3 - permissions problems (no replies)

Hi,
I'm a newbie and having trouble with permissions on WAMPserver 3.1.0.
On the first attempt, localhost is available, but subsequently gets "Access Denied."
Also, there's no access to phpMyAdmin or my virtual host (same error).


WAMPServer was installed as an Administrator.
There's no spurious php.ini or my.ini files.
Both Skype and IIS have been disabled.

WAMP icon=green
path to the installation of WampServer='C:\wamp'
Event Viewer shows no errors for 'Apache Service' or 'MySQL'.

It should be straight forward, I expect there's something really obvious I've missed.
Any help in finding the error would be most appreciated :)
Thanks in advance!
>>>>>>>>>>>>>>>>>>

Windows 10 Home 64bit 1703
WAMPserver 3.1.0 32bit
Apache Version 2.4.27
PHP Version 7.1.9
MariaDB Version 10.2.8
Notepad++ 7.5.1

AV=McAfee Livesafe 16.0.3
Firewall=Windows Defender

hosts
>>>>>>>>>>>>>>>>>>>
127.0.0.1 localhost
127.0.0.1 mediawiki-1.29.1

::1 localhost
::1 mediawiki-1.29.1
<<<<<<<<<<<<<<<<<<<<
# Virtual Hosts
#
<VirtualHost *:80>
DocumentRoot "c:/wamp/www"
ServerName localhost
ServerAlias localhost
<Directory "c:/wamp/www">
AllowOverride All
Require local
</Directory>
</VirtualHost>
<VirtualHost *:80>
DocumentRoot "c:/mediawiki-1.29.1"
ServerName mediawiki-1.29.1
<Directory "c:/mediawiki-1.29.1">
AllowOverride All
Require local
</Directory>
</VirtualHost>