WS4 lets you perform an instant search of your computer. WS4 helps you find and preview documents, e-mail messages, music files, photos, and other items on the computer. Please refer to the Knowledge base article KB940157 for a full description of the technology.

Note The WS4 installation process automatically upgrades previous versions of Windows Search technologies.

This download is for Microsoft Windows Vista Service Pack 1 or higher and Microsoft Windows Server 2008 only. Learn more.