Microsoft has released Windows Internet Explorer 10 Pre-release for Windows 7

Internet Explorer 10. Fast and fluid for Windows 7.

Fast: Internet Explorer 10 harnesses the untapped power of your PC, delivering pages full of vivid graphics, smoother video, and interactive content.
Easy: Experience the web the way you want to with pinned sites, built-in Spellcheck, and seamless integration with your PC running Windows 7.
Safer: Improved features like SmartScreen Filter and Tracking Protection let you be more aware of threats to your PC and your privacy.

  Windows Internet Explorer 10 Pre-release for Windows 7