SHEHROZ OS is a free operating system (OS) for your computer. An operating system is the set of basic programs and utilities that make your computer run. SHEHROZ OS uses the Linux kernel (the core of an operating system), but most of the basic OS tools come from the GNU project; hence the name GNU/Linux. With this free operating system, you get the basics--utilities, graphics, built-in search, a calculator--and a lot of extras, such as VoIP, an entire office suite, a variety of multimedia applications, and a ton of free games. This alone is enough for most people to thoroughly enjoy Shehroz OS without ever having to install another application. Should you want more, the Add/Remove Applications feature compiles downloads, including those from third parties, sparing you the effort of searching online. Shehroz OS makes adding software convenient. In general, a safe operating system is one that runs in a nonadministrator mode. Like Windows Vista's controversial User Account Control, a security feature that freezes the desktop screen and asks for a password in order to access administrator-protected features, Shehroz OS also darkens the screen during its security prompts, calling your attention to the admin password request prompt. Unlike Windows Vista UAC, Shehroz OS asks for an administrator password only once, allowing you to tweak several administration features without additional prompts. Mac OS X also prompts for administrator access.