New PC, wiped drive, or just a broken Office install, reinstalling Microsoft Office is usually a 10-minute job if you know where your license actually lives. Here’s how to do it properly, and what to do if you don’t have a working license to reinstall.
Step 1: Find Out How Your Office License Is Tied
Office is licensed one of two ways: tied to a Microsoft account (sign in and re download) or tied to a product key (reinstall using the key). If you bought a perpetual Office license, from us or anywhere else, it’s almost always the product key model, no Microsoft 365 sign-in required.
Step 2: Reinstalling With a Product Key
- Go to setup.office.com and enter your product key, or use the download link from your original purchase confirmation.
- Download the Office installer and run it.
- Sign in only if prompted for activation, this doesn’t create a subscription, it just verifies your key.
- Let the install finish, then open any Office app to confirm activation.
Step 3: Lost Your Product Key or Original Download?
Check your original purchase email first, most confirmations include both. If you genuinely can’t recover it, or you’re setting up a PC that never had a licensed copy of Office, Indigo Software sells genuine, perpetual Office licenses with instant delivery. One-time purchase, no subscription, and the key is yours to reinstall with any time.
Moving to a New PC?
Most retail Office licenses can be deactivated on the old device and reactivated on a new one. If you’re weighing whether to reinstall your current version or upgrade while you’re at it, see our guide on buying Microsoft Office without a subscription.
Frequently Asked Questions
Can I reinstall Microsoft Office without losing my documents?
Yes. Reinstalling Office only replaces the application files. Your saved documents, wherever they’re stored on your PC or cloud, are untouched.
Do I need internet access to reinstall Office?
Yes, for downloading the installer and activating your license. After activation, Office desktop apps work fully offline.
Can I install Office on a second computer with the same key?
Most retail perpetual licenses are tied to one device at a time. If you need it on multiple devices, check the specific license terms of your purchase, or ask us before buying if you need multi-device coverage.
Is it safe to buy a replacement Office key from a third-party reseller?
Only from a reputable, verifiable reseller. Indigo Software is a US veteran-owned business selling genuine, verifiable Microsoft licenses with real support if you ever run into activation issues.
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