It's all yours In Windows, even the little things are all about you. Like the screen that appears when your PC is locked—it can be any picture you choose. And you'll see quick notifications on your lock screen before you sign in to your PC or open a single app.
With picture password, you can sign in by tracing a pattern on a picture of your choice instead of typing a password. Zigzag over your dog’s face? Three taps on your child’s nose? The choice is yours.
Live updates at a glance Vibrant and beautiful, the Start screen is the first thing you'll see. Each tile on the Start screen is connected to a person, app, website, playlist, or whatever else is important to you. Tiles light up with the latest info, so you're instantly up to date. In one glance, you'll see that photo you were just tagged in, tomorrow’s weather, and messages from your friends.
The Start screen is all you Each tile on Start is connected to a person, app, website, folder, playlist, or whatever else is important to you. Pin as many tiles to Start as you like and move them around so it's just the way you want it.
This isn't the usual wall of static icons: Tiles animate with the latest information. Status updates, weather forecasts, Tweets, and more—you'll see live updates before you even open a single app.
See something, share something Your photos, websites, that funny video you just saw: Pretty much anything you're looking at, you can share with others. Instantly. There's no need to interrupt what you're doing, copy what you want to share, open another app, and paste it in. Just swipe in from the right and tap or click Share to immediately send it in email or post it to Facebook.
Windows has also made changes to make your PC more secure by boosting its existing security features and adding "SmartScreen," which acts to prevent suspicious programs or apps from being installed or running on your machine. Finally, Windows 8 also gives you the ability to "refresh" itself to give users a new starting point and a cleaner version of Windows.
If you upgrading from Windows 7 you can keep: Apps, Windows settings, and personal files
If you upgrading from Windows Vista you can keep: Windows settings and personal files
If you upgrading from Windows XP you can keep: Personal files
If you upgrading from Windows 8 Release Preview you can keep: Personal files