I like to use programs that no need to be installed it makes use of them much simple and setting easy to restore becouse most of thtem not using registry for it and if some happens you can fast recovery to same configuration just by copieng and runing software on other machine.
("As luck most of them are freeware<cuz no need to protect from unoff.use and also using often standards>")

Home usesers needs standards, it makes easy to connect and comunicate between PC's(this have also bad sides but...).

Companies need security ...
Security = "massive walls, difficult to undarstand, just chousen can use it"(often total control)