On Windows 7, Drupal 7, WAMP server running PHP 5.4.3 apache 2.4.2:
If you get the message
curl Not Found. The testing framework could not be installed because the PHP cURL library is not available.
on http://yourdrupal/update.php, even though you’ve enabled curl in php.ini in both the Apache- and the php-binfolder and through the wamp-trayicon thing, try the following: