Windows Update Troubleshooter is a handy tool from Microsoft which diagnoses and fixes issues with Windows Updates. If you’ve come across an update which keeps failing to install, give this tool a go. I’ve used it successfully on one of my PCs that is running Windows 8.1.
If you just want to scan for problems instead of automatically fixing them, go to advanced options (link found on first screen), and deselect “Apply repairs automatically”.
Windows Update Troubleshooter is free, and you can download it directly from Microsoft.
If you wish to change lock screen image in Windows 8.1 (this should work with Windows 8 as well), follow these steps –
On start screen, search for GPEDIT.MSC to open Local Group Policy Editor.
Go to Computer Configuration\Administrative Templates\Control Panel\Personalization and open setting “Force a specific default lock screen image”.
Select “Enable” option and enter path to the image file to display on lock screen.
Click on Apply to apply the changes. Next time you restart your computer, lock screen will display new image.
Enabling secure sign-in in Windows 8 and 8.1 will require users to press Ctrl+Alt+Del to get to login screen.
To enable secure sign-in, search for “netplwiz” from start screen.
When User Accounts screen opens, click on Advanced tab. Under Secure sign-in section, check “Require users to press Ctrl+Alt+Delete” option.
Click OK to close User Accounts screen. Next time you are logging into your computer, you will be prompted to press Ctrl+Alt+Del first.