For example, you could download a trial version of Windows Server 2012 R2 and enter a legitimate product key to get the full version.
You will need to buy it if you decide to continue using it beyond the trial period. The trial is exactly the same as the full version but will stop working after 30 days of use. Windows 10 trial version download In order to install the software on Windows® Operating System, you must log on to the computer using an account with administrator privileges.