See some of the most common upgrade and installation errors for Windows 10 and Windows 11, and what you can do to try to fix them.

Describes how to troubleshoot problems that occur when you install, uninstall, or upgrade a program on a Windows-based computer by using Windows Installer.

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

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

Oct 14, 2025 · The Program Install and Uninstall troubleshooter helps you automatically repair issues when you're blocked from installing or removing programs. It also fixes corrupted registry keys.

Help to fix install errors for Office, such as "can’t install Office", "something went wrong" or situations where install hangs or activation fails.

When upgrading to, or updating, Windows 10, you might encounter the error “We couldn’t update system reserved partition”, error code 0xc1900104, or error code 0x800f0922.

Learn how to fix "couldn't install Office" error related to 64-bit or 32-bit versions of Microsoft Office.

Windows Update error code "0x643" and Windows Installer error code "1603" are generic error codes. Typically, these error codes mean that the update was not installed.

Troubleshooting error message: Windows cannot access the specified device, path, or file. You may not have the appropriate permission to access the item.