You can reinstall Microsoft Office Home & Student 2021 through the Microsoft account to which you linked the licence during the first installation.
Reinstall Office 2021
- Go to office.com/myaccount and sign in with the Microsoft account used for the first activation.
- Open “Services & subscriptions” and find Office 2021.
- Select “Install” and complete the installation.
- Open an Office app and sign in with the same Microsoft account to activate the licence.
Office 2021 is not listed in your account
Check that you are signed in to the correct Microsoft account. If necessary, try other personal email addresses. SURFspot cannot see which Microsoft account is linked to the licence.