Installing and activating Office 2021 on a new computer

William Smith 40 Reputation points
2026-10-15T13:59:59.55+00:00

My NUC8i5 burned up due to multiple voltage spikes. One of my Office 2021 licenses was used on that computer. I need to install and activate Office 2021 on the new computer that replaces the burned up unit. I have no idea, and cannot find anywhere, the activation key. In the past, during a reset, Office 2021 was automatically installed and activated but I do not know what to do with a new computer. Please advise.

Microsoft 365 and Office | Other
Answer accepted by question author
Harshita Gupta 80 Reputation points
2026-10-15T14:03:32.86+00:00

If your Office 2021 license is linked to your Microsoft account, sign in at https://account.microsoft.com/services using the same account on your new computer. Check whether Office 2021 is listed and install it from there.

If activation fails, contact Microsoft Support and explain that your previous computer was damaged by voltage spikes. They can help you determine whether your license can be transferred.

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