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Fix Office Home & Student 2021 Mobile Device Error on New PC
Question details
The user is unable to install Office Home & Student 2021 on a new computer because the installer incorrectly displays an error stating it cannot be installed on a mobile device.
- Product
- Microsoft Office Home & Student 2021
- Device & OS
- not provided
- Scenario
- Setting up Microsoft Office on a newly purchased computer.
- Observed behavior
- The installation fails and incorrectly claims the software cannot be installed on a mobile device.
Ensure you have the login credentials for the Microsoft account used to purchase Office, and verify that your license is compatible with your new computer's operating system.
Remove Conflicting Installations and Reinstall from Your Account
Using the official Microsoft Support and Recovery Assistant clears out conflicting pre-installed versions that trigger the false mobile device error.
New computers often come with pre-installed trial versions or UWP (Universal Windows Platform) apps of Microsoft Office. These pre-existing files can conflict with the desktop installer for Office 2021, confusing the system into thinking you are installing on an unsupported mobile device.
Make sure all Office applications are closed and sign out of any Microsoft Office accounts currently active on the new PC.
Download and run the Microsoft Support and Recovery Assistant (SaRA) or the official Office uninstall tool. Follow the prompts to completely remove any existing Office installations or trials.
Open a web browser and sign in at account.microsoft.com using the Microsoft account associated with your Office 2021 purchase.
Navigate to 'Services and subscriptions', locate your Office Home & Student 2021 license, and click 'Install'. Follow the standard Windows or Mac installation instructions.
Avoid Installation Hassles with WPS Office
If Microsoft Office installation errors persist on your new computer, try WPS Office. It is a highly compatible, free, and lightweight alternative that installs in seconds without complex license checks or version conflicts.
- 1. Download the Installer: Visit the official WPS Office website and click the free download button for your operating system.
- 2. Install WPS Office: Run the downloaded setup file. The lightweight installation takes only a few moments and avoids complex registry conflicts.
- 3. Open Your Documents: Launch WPS Office to instantly open, edit, and save all your existing Microsoft Office files without any formatting loss.
Frequently Asked Questions
Why does Office say my new PC is a mobile device?
This false error usually occurs when a pre-installed Windows App version (UWP) or a mobile-style trial version of Office conflicts with the standard desktop installer. Removing the pre-installed version resolves the conflict.
Where can I find the Microsoft Support and Recovery Assistant?
You can download the Microsoft Support and Recovery Assistant (SaRA) directly from the official Microsoft Support website. It is designed to diagnose and automatically fix Office installation and activation issues.
Can I use my Office Home & Student 2021 license on both Mac and Windows?
No, Office Home & Student 2021 licenses are typically tied to a specific operating system. You must ensure you purchased the correct version (PC or Mac) for your new computer.
