Describes how to use the System File Checker tool to troubleshoot missing or corrupted system files in Windows.

If hardware was changed on a Windows device in order to upgrade to Windows 11 and the system is not recognizing the change in a timely manner, this article explains how to initiate the assessment manually.

If you're having problems with your Surface Pro, Surface Laptop, or another Surface device, try resetting or recovering it to its factory settings.

This security update includes fixes and quality improvements that are part of the following updates: January 13, 2026—KB5073724 (OS Builds 19045.6807 and 19044.6807) January 17, 2026—KB5077796 (OS Builds 19045.6811 and 19044.6811) Out-of-band January 24, 2026—KB5078129 (OS Builds 19045.6812 and 19044.6812) Out-of-band The following is a summary of the issues that this update addresses ...

You can use the Inbox Repair tool (SCANPST.EXE) to diagnose and repair errors in your Outlook data file. The Inbox Repair tool checks the Outlook data files on your computer to see if they're in good shape. You might want to use the Inbox Repair tool in the following situations: You receive a message that Outlook can't open your data file You receive a message that Outlook can't open the set ...

Select Install and more, and then select Install Microsoft 365 apps. Select Install Office, and then open the OfficeSetup.exe file that downloads to your computer. Tip As your apps are installing you might see the User Account Control prompt pop up and ask Do you want to allow this app to make changes to your device? Select Yes.

Learn how to use virus and threat protection options in Windows Security to scan your device for threats and view the results.

The installation media for Windows is a versatile tool that serves multiple purposes, including in-place installations for recovery and new installations. This media, typically created on a USB drive or DVD, contains all the necessary files to install or reinstall Windows on your device. It is particularly useful in scenarios where your system encounters significant issues, such as software ...

Windows includes a tool called Microsoft System Information (Msinfo32.exe). This tool gathers information about your computer and displays a comprehensive view of your hardware, system components, and software environment, which you can use to diagnose computer issues.

Learn how to troubleshoot problems updating Windows. Find answers to common questions and issues installing Windows updates.