Windows XP Highly Compressed 10 Mb

Windows XP featured a new task-based GUI (Graphical user interface). The Start menu and taskbar were updated and many visual effects were added, including:

A translucent blue selection rectangle in Windows Explorer
Drop shadows for icon labels on the desktop
Task-based sidebars in Explorer windows ("common tasks")
The ability to group the taskbar buttons of the windows of one application into one button, with a popup menu listing the window titles
The ability to lock the taskbar to prevent accidental changes (Windows 2000 with Internet Explorer 6 installed had the ability to lock Windows Explorer and Internet Explorer toolbars, but not the taskbar)
The highlighting of recently added programs on the Start menu
Shadows under menus (Windows 2000 had shadows under mouse pointers, but not menus)

Windows XP analyzes the performance impact of visual effects and uses this to determine whether to enable them, so as to prevent the new functionality from consuming excessive additional processing overhead. Users can further customize these settings. Some effects, such as alpha compositing (transparency and fading), are handled entirely by many newer video cards. However, if the video card is not capable of hardware alpha blending, performance can be substantially degraded, and Microsoft recommends the feature should be turned off manually. Windows XP added the ability for Windows to use "Visual Styles" to change the appearance of the user interface. However, visual styles must be cryptographically signed by Microsoft to run. Luna is the name of the new visual style that is provided with Windows XP, and is enabled by default for machines with more than 64 MiB of RAM. Luna refers only to one particular visual style, not to all of the new user interface features of Windows XP as a whole. Some users "patch" the uxtheme.dll file that restricts the ability to use visual styles, created by the general public or the user, on Windows XP.