By default, the lock screen shows notifications from the Messaging, Mail, Calendar and Weather apps. But maybe you'd like to see Twitter updates or info from another app, or you'd like to change the image. You can easily customize all that.
The place to go to do it is the Lock screen settings screen. To get there, press the Windows key + C to display the Charms bar, and then select the Settings icon. Click "Change PC settings" at the bottom of the Settings pane. The "PC settings" screen appears. Under Personalize, choose "Lock screen."
You'll see your lock screen image at the top of the screen. Just beneath the image are other images you can use. Click one to make it the new lock screen image. To find other images you can use for the lock screen, click the Browse button and browse through your pictures. Select the one you want to use and click the "Choose picture" button to make it your new lock screen image.
Here's command central for changing your lock screen settings, starting with the image.Click to view image.
Just below the image on the Lock screen settings screen is the "Lock screen apps" section. Here you'll find icons for the apps that automatically display notifications and updates on your lock screen.
Over to the right of them are several plus signs. Click a plus sign and you'll see a list of apps that can display notifications and updates. Pick one and it will display alerts and other information on the lock screen.
Note that when you click a plus sign, you'll see both the apps that are already displaying notifications and alerts on your lock screen as well as those that aren't currently doing so. If you choose one that already displays its notifications on the Start screen, nothing new happens -- the app still displays notifications, with no change. To stop an app from displaying notifications, click it and then click "Don't show quick status here."
Underneath that section is one that's a little more baffling: "Choose an app to display detailed status." The app in this section displays more information on the lock screen than other apps.
Only the Calendar app and the Weather app can show this kind of detailed information, and only one at a time. To change from one to the other, click the icon that's there and select the other icon. From then on, that app will show its detailed status.
If you want neither app to show detailed status, click the icon and select "Don't show detailed status on the lock screen." Neither app shows detailed information, and the icon changes to a plus sign. If you want to reinstate detailed weather or calendar information, click the plus sign and select either app.
5. Lock the lock screen image
If you share a Windows 8 PC with others and don't want them messing with the lock screen image, you can lock it so that it can't be changed. To do it, though, you're going to have to get down and dirty by editing the Registry.
Caution: Keep in mind before trying this that you can do damage to your system if you use the Registry incorrectly, so if you don't feel comfortable with Registry editing, stop right now. (See our story "The tweaker's guide to the Windows Registry" for more information about Registry editing. And be very sure to read the instructions for backing up the Registry before you attempt any Registry edits whatsoever.)