Microsoft Expression Studio 4 Web Professional is complete set of web design tools from Microsoft for creating Web graphics, Websites, and streaming video. It contains three applications that work in tandem: Expression Web 4, Expression Encoder, and Expression Design. Expression Web 4 enables the design, development, and maintenance of Websites and Web applications. The Expression Encoder executes encoding, live on-demand streaming, and format conversion while Expression Design contains the graphical tools for creating innovative designs.The Windows operating systems that support the application are Windows 7, Windows XP with Service Pack 3, Windows Vista, or Windows Server 2008. It requires a PC with 1 GHz ,CPU or faster, at least 1 GB RAM, and 2 GB of available hard-disk space, 128 MB of graphics RAM, and Pixel Shader 3.0 in hardware (32-bits per pixel). Additional requirements needed to support the application are NET Framework 4.0, Silverlight 4.0, support for Microsoft DirectX 9.0 graphics with Windows Vista Display Driver Model (WDDM) Driver, Internet functionality, DVD compatible drive, and a 1024 x 768-resolution monitor with 24-bit color.