Right know, probably Windows 7. Linux is not really used for home use and there are not many people on mac. On Windows, the most popular is still Windows 7 because XP and Vista are dead and the servers, scrap them. Then windows 8 is not great and Windows 10 is not the best for work computers so most desktops and laptops are still running Windows 7.
Explain further what you mean by that.
<span>A key is data called that is input into a cryptographic algorithm for the purpose of producing encrypted data. There are two types of cryptography, the public key and the private key. The public key uses public keys to encrypt data and private key uses private key to decrypt data. They are produced by a group of algorithms. </span>
