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.

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

Alternatively, if installation doesn't start automatically, browse the disc to find the program setup file, usually called Setup.exe or Install.exe. Open the file to start installation.

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.

Describes the new and improved features of Microsoft Windows Installer 4.5. The article also discusses the issues that are addressed from earlier versions of Windows Installer.

Learn how to get the latest software and driver updates for your Windows 10/11 device so you can keep playing your Xbox games.

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.

Describes the Windows Installer 3.1 v2 download that is available as a redistributable system component for Windows 2000 SP3, Windows 2000 SP4, Windows XP, Windows XP SP2, and Windows Server 2003.

How to install programs on Windows from online sources, such as from the internet or the Microsoft Store app.

Provides links to the uninstall tools and directions for many security programs.