I installed laravel homestead on two other machines and have never seen this problem before. I searched and searched, implemented many suggested fixes, and nothing works for me.
I installed a virtual box and a tramp, and I was stuck in the first hurdle:
vagrant box add laravel/homestead
returns the following error:

I installed curl.exe with all the dll files I could find and the certificate package file in my environment path.
Curl is definitely installed, but I'm not trying anything to work. Do I need a certificate from the destination site?
Other information that may be helpful:
- Recently, a clean installation of windows 8.1 was done because my new Lenovo laptop was full of adaware.
- php was installed via xampp
- composer set
- .
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, , laravel/homestead , .
laravel , , , , .

RuntimeException, , ;extension=php_openssl.dll
, , php.ini ~/xampp/php , , RuntimeException.
, cURL - .
xampp, .