This article describes the Windows Update Standalone Installer (Wusa.exe) in the following Windows operating systems: The Wusa.exe file is in the %windir%\System32 folder. The Windows Update Standalone Installer uses the Windows Update Agent API to install update packages.

Check for Windows updates. Learn how to get the latest Windows updates to keep your device running smoothly and securely.

The latest Windows update is Windows 11, version 23H2, also known as the Windows 11 2023 Update. Get the latest updates automatically as soon as they're available. You can now choose to have Windows get the latest non-security and feature updates as soon as they become available for your device.

If you're currently running Windows 10, version 1507, 1511, 1607, 1703, 1709, or version 1803, you can expect to receive a notification that states that your device must have the latest security updates installed and then offers to update your device.

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

This article applies only to releases on the Windows Update website. This article does not apply to security releases for products that are not supported by Windows Update.

The latest Windows update is Windows 11, version 23H2, also known as the Windows 11 2023 Update. Get the latest updates automatically as soon as they're available. You can now choose to have Windows get the latest non-security and feature updates as soon as they become available for your device.

Check for Windows updates. Windows Update downloads updates for Windows Security automatically to help keep your device safe and protect it from attacks.

Windows Update troubleshooter. Automatically repair system files and settings to improve device security. Next steps. The device should now be able to update as expected without further steps. Microsoft is working on a resolution to prevent this issue and will provide an update in an upcoming release.

Each release of the tool helps detect and remove current, prevalent malicious software. This malicious software includes viruses, worms, and Trojan horses. Microsoft uses several metrics to determine the prevalence of a malicious software family and the damage that can be associated with it.