Wamp 403 Forbidden – You don’t have permission to access / on this server.

Look for this part in the httpd.conf file installed in C:\wamp\bin\apache\apache 2.x.xx\conf

# First, we configure the "default" to be a very restrictive set of 
# features.  
#
<Directory />
    Options FollowSymLinks
    AllowOverride None
    Order deny,allow
#   Deny from all
</Directory>

and this part:

# Controls who can get stuff from this server.
    #

#   onlineoffline tag - don't remove
    Order Allow,Deny
    Allow from all
#	Deny from all

</Directory>

Make sure both lines that say "deny from all" are commented out with a #.