Describes how to use the System File Checker tool to troubleshoot missing or corrupted system files in Windows 8.1, Windows 8, Windows 7 or Windows Vista.

Unblock the updated URLs in the firewall or proxy, or disable CRL checking for the Data Access service and the Management Configuration service. To download the latest CTLs, use the following updated URLs: http://ctldl.windowsupdate.com/msdownload/update/v3/static/trustedr/en/disallowedcertstl.cab

Windows 11. Summary. This update makes quality improvements to the servicing stack, which is the component that installs Windows updates. Servicing stack updates (SSU) makes sure that you have a robust and reliable servicing stack so that your devices can receive and install Microsoft updates. How to get this update. Windows Update.

Windows 8.1. Open Windows Update by swiping in from the right edge of the screen (or, if you're using a mouse, pointing to the lower-right corner of the screen and moving the mouse pointer up), select Settings > Change PC settings > Update and recovery > Windows Update. If you want to check for updates manually, select Check now.

Follow these steps to automatically diagnose and repair Windows security problems by turning on UAC, DEP protection, Windows Firewall, and other Windows security options and features. Select the Download button on this page.

How to get this update. Method 1: Windows Update. This update is available through Windows Update. It will be downloaded and installed automatically. Method 2: Microsoft Update Catalog. To get the stand-alone package for this update, go to the Microsoft Update Catalog website. Method 3: Windows Server Update Services.

Windows 10 Windows 11. Summary. Microsoft Update Health Tools is offered to devices through Windows Update as update KB4023057. This update is applicable for both Windows consumer and commercial devices, with a slightly different purpose and functionality.

KB5004378: Servicing stack update for Windows 7 SP1 and Server 2008 R2 SP1: July 13, 2021. Windows 7 and Windows Server 2008 R2 have reached the end of mainstream support in January 2020 and are now in extended support. For more information, see here.

Fix problems using Windows Update is a recovery tool that can help resolve issues related to updates. Using this tool will reinstall the current version of Windows on your device. This tool preserves all your apps, documents, and settings. Make sure to keep your PC connected to a power source and the internet during reinstallation.

This update has been replaced by the latest update for customer experience and diagnostic telemetry that was first released on June 2, 2015. To get the update, see 3080149 Update for customer experience and diagnostic telemetry.