A method, system, and computer program product for efficiently providing software product updates in a client's computer system. A Software Product Update (SPU) utility initiates the software update process by downloading a response file. The response file comprises scripted code and encoded data for an update of application system files. The SPU utility processes the response file with the aid of a script processing engine (SPE), which is saved, along with installation files, on the client's computer system during an initial software product installation. The SPU utility sets the installation properties within the installation file set to values which allow the SPE to access and run the scripted code. The embedded binary data is decoded with the aid of the running scripted code. The SPU utility completes the update of application system files and the installation properties file, with the aid of the decoded embedded data.