Windows leader Terry Myerson Kyle Russell/Business Insider Microsoft is making big changes to Windows 8.

At today's Build conference, Microsoft announced a number of changes that it hopes will improve the user experience for those using the Windows 8 operating system on laptops and desktops.

The biggest change is that computers with keyboards will launch in a traditional desktop-computing environment, instead of the tile-based look Microsoft had been pushing with Windows 8.

This is an acknowledgment that Microsoft's attempt to reimagine Windows in a more tablet-like interface did not work.

The tile-based look of Windows 8 was baffling to people who grew up using Windows-based PCs. It was a big turn-off and contributed to a decline in PC sales.

After users install the updates rolling out today, Windows 8.1 will give current laptop and desktop users options to enable the above features. The company says it won't force anything new on people that they might not want.

On new products from Microsoft's licensees, however, laptops and desktops (anything with a keyboard and mouse or trackpad) will automatically default to having these new settings turned on.

Back in February, Microsoft executive Joe Belfiore said that most users who have a touch-screen laptop prefer the tile interface in Windows 8. He also said that users without touchscreens tended to prefer the Windows 7-style desktop environment.

With sales of traditional PCs falling by double-digit percentages, Microsoft is doing anything it can to bolster its position.

While it's not giving up on the tile look, it is making it an increasingly optional feature. Even before today's update, Windows 8.1 had the option to boot to the traditional desktop screen instead of the horizontal tile menu.

There are now going to be a power button and a search bar on the start screen, so that desktop users don't have to remember which screen-edge mouse gesture they have to make just to put their computer to sleep or find a file.

On the tile-based start menu, right-clicking on a tile will offer several common actions a user might want to do with a tile, a feature many users thought would be there in Microsoft's testing.

Microsoft is letting users organize apps as they did back in Windows 7, via the taskbar (even for the Modern-style apps downloaded from the Windows Store).

To appease those who don't like using tiles at all on their laptop or desktop, Microsoft teased the following screen of Windows with an old-school Start menu and Modern-style Windows 8 apps running in windowed mode, features it says are coming in an update later this year.

Microsoft isn't totally ditching the look and feel of Windows 8. Apps opened from the Windows Store will still open in full-screen mode, but moving the mouse up to the top of the screen will prompt a menu bar to drop down with minimize and exit buttons.

Minimizing a Windows 8 app will put it in the taskbar. A right click will give an option to pin it there, making it easily accessible within the Windows 7-style desktop environment.