Office Installation Errors

Fix Click-to-Run Errors When Installing Microsoft Project

John WilsonJohn Wilson Oct 26, 2026 869 views

Question details

Users are encountering a Click-to-Run error message that prevents Microsoft Project from being installed.

Fix Click-to-Run Errors When Installing Microsoft Project
Product
Microsoft Project
Device & OS
not provided
Scenario
Installing the desktop version of Microsoft Project on a system that may already contain other Microsoft Office applications.
Observed behavior
The installation process fails and displays a Click-to-Run error, typically caused by installation type conflicts (MSI vs. Click-to-Run) or unsupported licensing plans.
Before you start

Verify your Microsoft Project license plan to ensure it includes the desktop application, and check your current Microsoft Office installation type to see if it uses Click-to-Run or Windows Installer (MSI).

Solution 1Recommended

Resolve Click-to-Run and Windows Installer (MSI) Conflicts

Microsoft does not support installing mixed deployment types (Click-to-Run and MSI) for Office products on the same computer.

If you already have a Windows Installer (MSI) version of Microsoft Office installed, you cannot install a Click-to-Run version of Microsoft Project of the same version year alongside it. You must ensure all installed Office applications share the same deployment architecture.

1
Check Current Office Installation Type

Open an existing Office application such as Word, click on 'File', and select 'Account'. Under Product Information, if you see an 'Update Options' button, your Office is Click-to-Run. If there is no such button, it is MSI.

2
Uninstall Conflicting Office Applications

Open the Control Panel, navigate to 'Programs and Features', select the MSI version of Microsoft Office, and click 'Uninstall' to remove it.

3
Reinstall Office and Project

Restart your computer, then install the compatible Click-to-Run versions of both your main Microsoft Office suite and Microsoft Project from your Microsoft 365 portal.

Version Compatibility: Even if both are Click-to-Run, you generally cannot mix different version years (like 2016 and 2019) of Office and Project on the same device.
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Frequently Asked Questions

What is a Click-to-Run installation?

Click-to-Run is a modern Microsoft streaming and virtualization technology used to rapidly install and update Office products over the internet. It has largely replaced the older Windows Installer (MSI) deployment method.

Can I install Click-to-Run and MSI versions of Office together?

No, Microsoft strictly prohibits installing products that use Click-to-Run and products that use Windows Installer (MSI) on the same computer if they share the same primary version year.

Why doesn't my Project license allow me to install the desktop app?

Microsoft offers different tiers of Project subscriptions. Basic plans like Project Plan 1 only provide browser-based access. You must have Project Plan 3 or Plan 5 to download and install the desktop application.

How do I check if my current Office is Click-to-Run?

Open any Office app like Word, navigate to File > Account, and check the 'Product Information' section. If you see an 'Update Options' button, your installation uses Click-to-Run.