Microsoft 365 Installation Problems

How to Activate Existing Microsoft 365 on a New Computer Without Paying Twice

Huda Qurayshi Oct 12, 2026 870 views

Question details

Users want to activate their existing Microsoft 365 subscription on a newly purchased computer without accidentally purchasing a duplicate subscription from the preinstalled trial.

Product: Microsoft 365
Device & OS: not provided
Scenario: Setting up a new computer that comes with a preinstalled Microsoft 365 trial while the user already has an active subscription.
Observed behavior: The new computer prompts the user to start a trial or buy a new subscription, creating confusion about how to link the existing account without paying twice.

Before you start

Ensure you have the email address and password for the Microsoft account associated with your active Microsoft 365 subscription ready.

Solution 1Recommended

Sign In to the Preinstalled Office App

The easiest way to use your current subscription is to simply sign in to the preinstalled Office applications using your existing Microsoft account.

Open an Office Application

Click the Start menu and open an application like Microsoft Word or Excel on your new computer.

Bypass Trial Prompts

If a welcome screen appears asking you to start a free trial or buy a subscription, ignore the purchase buttons.

Sign In with Existing Account

Click 'Sign in' or 'I have a subscription' and enter the email address and password for the Microsoft account linked to your active Microsoft 365 plan.

Activation Complete: Once signed in, the software will automatically recognize your active license and remove any trial restrictions.

Solution 2

Uninstall Preinstalled Trial and Reinstall Office

If signing in doesn't work or the preinstalled version conflicts with your account, a fresh installation from your Microsoft account is required.

Free Microsoft Office alternative

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1. Download the Installer: Visit the official WPS Office website and download the free installation package for your new computer.
2. Install WPS Office: Run the downloaded installer and follow the on-screen instructions to set up the software in just a few minutes.
3. Open Your Existing Files: Launch WPS Office and open your existing Word, Excel, and PowerPoint files directly. No format conversion is needed.

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Frequently Asked Questions

Will I lose my existing files if I uninstall the preinstalled Microsoft 365 trial?

No. Uninstalling the trial software from your new computer will not affect your personal files, documents, or data stored in OneDrive or your local hard drive.

Do I need to deactivate Office on my old computer before installing it on the new one?

If you have a current Microsoft 365 subscription, you can remain signed in on multiple devices (up to 5 at the same time). You do not need to deactivate the old computer unless you have reached your device limit.

Why is my new computer saying my Microsoft 365 subscription is expired?

This usually happens because the computer is trying to activate a bundled trial that has lapsed. Make sure to sign out of any default accounts and sign back in using the specific Microsoft account tied to your active, paid subscription.

Installation & Activation