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

This page features a list of common error codes and solutions. Learn how to find your error code quickly.

System File Checker is a utility in Windows that checks for problems with files on your computer. To run it, follow these steps: Make sure you've installed the latest updates for Windows, and then restart your machine. To find out more, read Update Windows.

Get Help has troubleshooters you can run for many common scenarios. These often help resolve issues without the need to contact support. If a troubleshooter is available for your issue, select Start to run that troubleshooter.

In this article, we will help you find your error code and suggest what you might try to correct the error. Follow the recommended resolutions for that error code.

When trying to boot Windows, you receive the error: An operating system wasn’t found. Try disconnecting any drives that don’t contain an operating system. Press Ctrl+Alt+Del to restart

Learn how to run Windows Update Troubleshooter to resolve errors downloading or installing Windows updates.

When you try to install, update or start a program or a file, you receive the following error message: Error: Windows cannot access the specified device, path, or file. You may not have the appropriate permission to access the item.

Before searching for a specific error code, try the tips listed in General fixes. If those don't fix your upgrade or installation problem, check the table of error codes at the bottom of this article.

With System Restore you can revert your PC's state to a previous point in time. This can be particularly useful when troubleshooting issues caused by recent changes, such as software installations, driver updates, or system settings modifications.