Windows 8.1 offers more opportunities to customize the Start screen, including the ability to resize tiles and add animated background images.
In Windows 8.1, downloaded apps are no longer automatically pinned to your Start screen. Instead, you can bring up the Apps page and select which ones you'd like on the Start screen.
The Lock screen can now display images from your photo gallery. In addition, you can now launch the camera and accept incoming Skype video calls without having to unlock the screen.
With Windows 8.1, you can boot up in desktop mode and Microsoft has added the Start button back to the desktop, though it doesn't operate entirely the same.
The new Radio feature in Xbox Music allows you to create artist stations without the need for a subscription or Xbox Music pass. Sweet!
Smart Search now brings together Web results from Bing, information about the entity, deep links within apps on the PCs and more.
The Photos app now offers editing tools, including a color enhancer where you can manipulate tones using an onscreen dial. The camera also now has a built-in panorama mode.
The new Reading List feature allows you to save an article that you want to read for later. Saved articles are synced across all your devices via SkyDrive.
Microsoft added a couple of new native apps to Windows 8.1. One is the Health & Fitness app, which offers tools for tracking workouts and diet.
Collect recipes and create menus and shopping lists in the Food & Drink app. You can activate the camera and use hand gestures to flip pages so you don't have to touch the screen.
Looking to make app discovery easier, the Windows Store now features a flatter layout and offers personal recommendations.
Microsoft tweaked the onscreen keyboard to make it easier to input numbers and symbols without have to switch modes.