Can you reinstall Office with product key?

When you buy a new computer with Microsoft Office preinstalled or purchase a copy of Office at a retail store, be sure to put the software's product key in a safe place. Do the same with the username and password of your Microsoft account if you buy Office online. If your hard drive crashes and you need to reinstall Office, you can't do it without that code.

  1. Locate your 25-character Microsoft Office product key. Look for a sticker on a card if you purchased Office from a retailer, either with or without the DVD. Sign in to Office Online with your Microsoft account (link in Resources) if you purchased and downloaded Office online to retrieve your 25-character product key.

  2. Register for an evaluation copy of Microsoft Office from Microsoft TechNet (link in Resources) and download the setup program if Office was preinstalled on your drive and destroyed in the crash, or if you no longer have the original media. Download the Microsoft Office setup program if your purchase is linked to your Office Online account with Microsoft.

  3. Navigate to your saved download and double-click it to launch the setup program. If you have the original media, insert the DVD into the optical drive and wait for the Autorun box to appear, then select "Continue."

  4. Read the Microsoft Software License terms, check the box to accept them and select "Continue."

  5. Tap or click "Install Now" to reinstall Office to your computer. Select "Finish" when the installation is complete.

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Can you reinstall Office with product key?

Microsoft (edited)

Windows and Microsoft Office go hand in hand, but that doesn’t always mean the likes of Word, Excel and PowerPoint are pre-installed when you buy a new device.

Indeed, Windows 11 doesn’t come with Microsoft Office by default. Unless you’re willing to pay for a Microsoft 365 subscription, a standalone version of Office is probably your best alternative.

Recent versions are automatically linked to your Microsoft account, so you’ll just need to sign in there on every device you want it installed on – provided it supports more than one.

But before 2013, Office still relied on Product Keys. These are unique 25-character codes which are required each time the apps are re-installed.

After purchasing it (from the Microsoft website or elsewhere), you may prompted to enter the Product Key for every device you choose to install it on. This is a unique 25-character code that’s sometimes required for activation purchases.

But what about if the worst happens and you lose your product key? Does that mean you can’t reinstall Office again?

Fortunately, all is not lost. Here’s how to retrieve your Office product key via Windows. 

How can I find an Office product key (2013 or later)?

On modern versions of Office, you might not even need a product key. Head to account.microsoft.com from your new device, then see if you can download the apps via your purchase history.

But if Office was pre-installed when you bought your PC or laptop, you might find a sticker on the machine itself with the code.

Whether Office was pre-installed or not, here’s the bad news: Microsoft changed how product keys are stored, so beginning with Microsoft Office 2013, only the last five digits of the 25-character code are stored in the Registry for Office 2013, 2016, 2019 and 2021.

What this means is that – as with all Windows product keys – any code that a keyfinder app shows you will not work. If the first 20 digits are shown at all for an Office product, they will be generic.

The useful part, though, is that the last five digits should be the correct ones for your license which means you can search your email and computer’s hard drive to see if you find any emails or matching files which contain the full product key. 

If that fails, your remaining options are to do a full factory reset on your computer (but only if there is a recovery partition that includes all the original software that came with it) or to buy a new copy of Office.

However, if you weren’t aware, there are a few excellent free office suites which work just like Microsoft’s version and can save in the same formats, which means files you create with them can be opened and edited by others using Microsoft Office. See our recommendations for the best Office alternatives here.

How do I find my Office product key (pre-2013)?

For older versions, you may have thought to locate the product key by hunting through the Windows Registry, but the codes are encrypted. Luckily, there are plenty of apps that will do all the legwork for you.

Our favourite of these is ProduKey, a free app which will delve into the Registry to fish out and decrypt your Office product key (Office 2010 or earlier).

Can you reinstall Office with product key?

Once downloaded, run it and it will immediately display the product keys of any Microsoft Office software up to (but not including) 2013, as well as the keys of legacy operating systems such as Windows Vista, 7 and 8. Then you can either copy the keys for future use, or export them to a HTML file and save it for future reference.

If it doesn’t work, try Belarc Advisor, or if you’re willing to pay for software, Recover Keys is able to scan more deeply than any free app.

Can you reinstall Office with product key?

Although you’re probably interested in finding only your Office product key, Recover Keys supports over 10,000 apps. It can scan remote Windows and Mac computers, recover license keys from external storage, scan multiple Windows installations, and can even run from a USB drive. And at $29.95/£24.95, it’s cheaper than buying another copy of Office.

  • How to find your Windows product key
  • How to get Microsoft Word for free
  • How to get Microsoft Excel for free

If you need it, here’s how to get the product key for Windows itself.

Can you reinstall Office with product key?

As the resident expert on Windows, Senior Staff Writer Anyron’s main focus is PCs and laptops. Much of the rest of his time is split between smartphones, tablets and audio, with a particular focus on Android devices.

Can you reinstall Office with the same product key?

Instead, for Microsoft 365, Office 2021, Office 2019 and Office 2016, you can view the Microsoft account that Office belongs to. This account takes the place of your product key and can be used to reinstall Office from the Microsoft account, Services & subscriptions page and to activate Office.

Can Microsoft Office be reinstalled?

Once the uninstall is complete, sign in again to www.office.com and select Other install options, choose the language and version you want (64 or 32-bit), and then select Install. (See Install Visio or Install Project if you need to reinstall those stand-alone apps.)

Can I reinstall an uninstalled Microsoft Office?

Yes, you can uninstall and reinstall your Microsoft Office application at any time, as long as you know your Microsoft credentials. Before you uninstall, though, it is best to do a back-up of your files, to make sure that you won't be losing any.

Can I reuse Office product key?

Yes, the Office license may be re-installed on the same computer after re-installing Windows. What you need depends entirely on the Office version/bundle that you have. If you have Office 2016/365 then you need to know the email account and password used to activate the license.