If you are unable to locate the BitLocker recovery key and can't revert any configuration change that might have caused it to be required, you’ll need to reset your device using one of the Windows recovery options. Resetting your device will remove all of your files.

This article describes an issue that blocks the detection of the NK.bin file by the boot loader in Windows Embedded Compact 2013. An update is available to fix this issue. Before you install this update, all previously issued updates for this product must be installed.

The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately. MUM and MANIFEST files, and the associated security catalog (.cat) files, are critical to maintaining the state of the updated component.

Microsoft Defender Antivirus is a powerful tool that finds and removes malware from your PC. Here's how to use it in Windows 10 or 11 to scan your PC. Important: Before you use Microsoft Defender Offline, make sure to save any open files and close apps and programs. Open your Windows Security settings.

Find the Recycle Bin. If your desktop shows no icons at all, right-click (or press and hold) the desktop and select View. If Show desktop icons has no checkmark, click it to add one. If that doesn't work, try this: Select Start > Settings > Personalization > Themes > Desktop icon settings.

Open the Surface app. In the Surface app, expand Help & support to check if the update status is "You're up to date" or something else. If needed, select the option to update the devices. Note: If you don't have the Surface app installed, you can download the Surface app from the Microsoft Store.

If the Msxml4.dll file is locked, the file may not be updated when you apply security update MS06-071 for MSXML 4.0, for MSXML 4.0 SP1, and for MSXML 4.0 SP2. To work around this issue, use the following commands to uninstall Msxml4.dll: MsiExec.exe /uninstall {37477865-A3F1-4772-AD43-AAFC6BCFF99F} /passive.

To help keep Windows devices secure, Microsoft adds vulnerable bootloader modules to the Secure Boot DBX revocation list (maintained in the system UEFI-based firmware) to invalidate the vulnerable modules.

To help reduce app compatibility issues, we have automatically raised the authentication level for all non-anonymous activation requests from Windows-based DCOM clients to RPC_C_AUTHN_LEVEL_PKT_INTEGRITY at a minimum.

You can uninstall PC Health Check by going to Apps > Apps & Features > App list (Windows PC Health Check) > Uninstall. Known issues in this update. Microsoft is not currently aware of any issues with this update. How to get this update. Important You must restart your device after you install these required updates. Install this update.