Q: What is the difference between Old and New Update Technology? A: [Old Update Technology as of 17763.1] It detects existent package and updates the existent package. [New Update Technology form 18362.1 forward] It installs new mum, and updates the targeted package defined in the new mum. PS. Unless both targeted and not-targeted packages are perfectly existent, the update fails. And, the New Update Technology is accompanied with PSFX update.