Generally, this disclosure describes software delivery systems (and methods). A server is provided that operates to provision software on a customer's local machine. The server system, in response to a software purchase from an end user (customer), is configured to install the software on the customer's machine, encrypt the software, and provision encryption keys to grant the customer access to the software. In addition, a software agent is installed on the customer's machine that enables monitoring, by the server, of the customer's installed software. The server system is configured to control customer access to the installed software, via the software agent, and to terminate customer access to the software (for example, for nonpayment of fees). Thus, the software provider can retain control over software that is remotely deployed at an end user location.