Problem when uncommenting ";" Curl in php.ini installing magento 2

In the installation of Magento 2 I have this issue:

PHP Extensions Check 1 missing PHP extensions.

PHP Extension curl.

and I have already commented on the php.ini:

extension=php_bz2.dll
extension=php_curl.dll    
;extension=php_fileinfo.dll
extension=php_gd2.dll

and still I keep getting the error ..