Incorrect install scripts

I downloaded the WordPress ZIP file and unzipped it to my local WAMP www directory, edited the wp-config.php file, then ran the install from http://localhost/wordpress

> the first fatal error I received was because the index.php script had an incorrect path in it:
require_once(‘./admin.php’);
…should be:
require_once(‘wp-admin/admin.php’);

> the next fatal error was this:
“Fatal error: Call to undefined function wp_cache_init() in C:\wamp\www\wordpress\wp-includes\load.php on line 407”

…not sure how to get around this one, any advice would be appreciated!