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.

Open the Office folder in the virtual drive, and then select either the Setup32.exe to install the 32-bit version of Microsoft 365, or Setup64.exe to install the 64-bit version to begin the offline installation.

If the Windows Installer engine is corrupted, disabled, or installed incorrectly, this may cause program installation issues. Use the following methods to identify any Windows Installer issues that may be causing problems when you install, uninstall, or update programs.

This package is larger than the web installer and does not include the language packs. We recommend that you use the web installer instead of the offline installer for optimal efficiency and bandwidth requirements.

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

To install Office in a different language, or to install the 64-bit version, use the dropdown to find more options. Choose the language and bit version you want, and then select Install.

Which version of Windows should I install: the 32-bit version or the 64-bit version? Windows 11 doesn't have a 32-bit version and is 64-bit only. Installs will always be 64-bit. To install a 64-bit version of Windows, you need a CPU that's capable of running a 64-bit version of Windows.

This package is larger than the web installer and does not include the language packs. We recommend that you use the web installer instead of the offline installer for optimal efficiency and bandwidth requirements.

Learn how to install, reinstall, or activate Microsoft 365 or Office 2024 on a PC or Mac.

Choose the language and the bit version you want, then select Install. (To install 64-bit, under Version, select Advanced, choose 64-bit, and then select Install.)