Product Key Issues

How to Restore Office Home and Student 2021 After a Laptop Reset

Maira Mehtab Sep 22, 2026 869 views

Question details

The user needs to recover and reinstall their perpetual license of Office Home and Student 2021 after a system reset removed it and replaced it with Microsoft 365.

Product: Office Home and Student 2021
Device & OS: Windows
Scenario: Recovering and reinstalling previously purchased software following a laptop factory reset.
Observed behavior: Office Home and Student 2021 is completely missing from the system, and a Microsoft 365 application has been installed in its place.

Before you start

Ensure you have the login credentials (email and password) for the exact Microsoft account that you originally used to purchase or activate your Office 2021 license.

Solution 1Recommended

Reinstall Office 2021 from Your Microsoft Account

Since resetting a Windows laptop removes installed applications, you must log into your Microsoft account to redownload and activate your perpetual Office 2021 license.

A system reset often restores a laptop to its factory settings, which wipes out user-installed programs. Manufacturer defaults usually include a Microsoft 365 trial, which is why it appeared instead of your Office 2021 software.

Sign in to Microsoft Account

Open your web browser and go to account.microsoft.com. Log in using the email address associated with your original Office 2021 purchase or activation.

Navigate to Subscriptions

Click on 'Services & subscriptions' from the top navigation menu.

Locate Office 2021

Scroll down the page to find 'Office Home & Student 2021' listed under your 'Products you've purchased' section.

Download the Installer

Click the 'Install' button next to Office Home & Student 2021 to download the setup file to your laptop.

Run Setup

Double-click the downloaded setup file and follow the on-screen instructions to finish installing your Office suite.

Account Recovery Required: If you cannot recover the Microsoft account or do not have the original product key, your digital Office license cannot be verified and restored.

Solution 2

Uninstall the Pre-loaded Microsoft 365 Trial

Remove the factory-default Microsoft 365 application to prevent conflicts and default app issues when you install Office 2021.

Free Microsoft Office alternative

Try WPS Office if You Cannot Recover Your Office 2021 License

If you lost access to your Microsoft account or product key after the laptop reset, you don't need to purchase an expensive new Microsoft 365 subscription. WPS Office offers a free, powerful, and highly compatible alternative to handle all your document needs.

1. Download the Installer: Visit the official WPS Office website and click the 'Free Download' button to get the setup file.
2. Install WPS Office: Run the downloaded executable file and follow the quick, straightforward installation wizard.
3. Open Your Files: Launch WPS Office and instantly open, edit, and save your existing Word, Excel, and PowerPoint documents without formatting loss.

Fully compatible with Microsoft Office formats including .docx, .xlsx, and .pptx.Free to use without requiring complex license keys or recurring subscriptions.Lightweight application that will not slow down your newly reset laptop.Familiar user interface for seamless migration from Microsoft Office.

microsoft office alternative - wps office

Frequently Asked Questions

Why did Microsoft 365 replace my Office 2021 after a laptop reset?

When you reset a laptop (such as Dell, HP, or Lenovo), it restores the original factory software image provided by the manufacturer. This default image often includes a pre-installed trial of Microsoft 365 instead of the standalone Office software you purchased later.

Can I restore Office 2021 without my Microsoft account?

No. Modern digital licenses for Office 2021 are strictly tied to the Microsoft account used during the initial activation. You must recover access to that specific account to authorize the reinstallation.

Where can I find my original Office 2021 product key?

If you bought a physical copy, the product key is printed on a card inside the packaging. For digital purchases, check your email receipt, the digital purchase history of the retailer, or the 'Services & subscriptions' tab of your Microsoft account.

Installation & Activation