Microsoft plans to distribute its latest Windows 8.1 update to existing machines through Windows Update on April 8th (MSDN and TechNet customers can download it today). The software maker has been accused of going too far with its Windows 8 vision and forgetting the huge amount of people that still use desktop PCs and laptops. I think we did a little too much too quickly, and we didn’t do enough for the mouse, admits Microsoft’s Chaitanya Sareen. Microsoft has also tweaked the hot corners that typically appear for the Charms and quick app switching in the desktop, adding a delay so they don’t pop up unexpectedly when you go to close a desktop app or navigate backwards in a browser.