Use the System File Checker tool to repair missing or corrupted system files. When critical Windows system files are missing or corrupted, some Windows features may stop working correctly or Windows may stop responding altogether.

Learn about the standard terminology that is used to describe Microsoft software updates.

Extract this .zip file to get the Defender update package (defender-dism- [x86|x64|arm].cab) and an updating tool (DefenderUpdateWinimage.ps1) that assists the update operation for OS installation images. The following prerequisites apply to running this updating tool (DefenderUpdateWinImage.ps1):

To install this update, use one of the following Windows and Microsoft release channels. This update downloads and installs automatically from Windows update and Microsoft Update. See the other options. File information. For a list of the files provided in this update, download the file information for cumulative update 5063812 .

Learn how to update your security processor or TPM firmware to protect Windows 10 and your device from attacks by malicious software.

Keeping your Surface up to date helps it perform at its best. In addition to software updates for Windows, it's also important to install hardware updates—these include drivers and firmware.

Fixes a SQL injection vulnerability in a system stored procedure. Prevents logins with the ALTER ANY LOGIN permission from resetting the passwords of logins that have ALTER ANY LOGIN or IMPERSONATE ANY LOGIN permissions to avoid elevation of privilege.

Learn how to use the PC Health Check app to help you improve your device performance.

Learn about the terminology that Microsoft uses to describe software updates. Describes an update to Windows 10, version 2004 that enables version 20H2 functionality.

See how to work with ActiveX controls in your files, changing their settings, and how to enable or disable them by using the Message Bar and the Trust Center. You can also learn more about ActiveX controls and how they improve your files.