Microsoft Office 2021 Pro Plus + Windows 11 Pro – Bundle License Keys (1 PC)

Office 2021 and Windows 11 Pro bundle: two perpetual keys for one PC

A great many PCs in homes and small offices are sound machines running an operating system that stopped receiving security updates on October 14, 2025, with an old or unlicensed copy of Office on top. The Office 2021 and Windows 11 Pro bundle is the one-order fix. It delivers a Windows 11 Pro key to bring the computer onto a supported operating system, and an Office 2021 Professional Plus key for the full seven-application suite, including Publisher and Access. Both are genuine, both are perpetual, and both arrive together by email.

The buyers we see are people upgrading a Windows 10 desktop or laptop that passes the Windows 11 hardware check, shoppers who picked up a refurbished or barebones PC without an operating system, small offices that still rely on Publisher for printed material and want each workstation licensed for a flat one-time cost, students and parents setting up a study PC, and repair shops and system builders who hand over machines with both Windows and Office activated. If you want the newest Office instead, the Office 2024 Pro Plus and Windows 11 Pro bundle is the same idea built on the 2024 release.

From Software in Store you receive both 25-character keys, the official Microsoft download links for Windows 11 and Office 2021, and a short guide, usually within minutes of payment. The license type of each key is shown in the Product Overview table on this page.

What the two keys give you

• Windows 11 Pro: the current Microsoft operating system with BitLocker encryption, Remote Desktop host, Hyper-V, Windows Sandbox, Group Policy, domain and Microsoft Entra ID join, and ongoing security updates through Windows Update.
• Office 2021 Professional Plus: Word, Excel, PowerPoint, Outlook (classic desktop client), OneNote, Access and Publisher, the last Professional Plus generation to include Publisher.
• Excel 2021 with XLOOKUP, XMATCH, dynamic arrays and LET; Word with co-authoring and Dark mode; PowerPoint with Record Slide Show.
• Access 2021 for desktop databases and Publisher 2021 for newsletters, flyers and existing .pub files.
• Two independent keys, so Windows can be installed and activated first and Office added whenever convenient.
• Official Microsoft installation media for both products through the links in your delivery email.
• No subscription for either product; security updates for Office 2021 through its support period and for Windows 11 through its normal lifecycle.

Teams is not included with either product, though the free Teams app installs alongside them. Everything else listed is in the downloads and matches the builds organizations deploy.

Comparing the bundle with the alternatives

The table sets this bundle beside the 2024 bundle, the separate keys and a Windows 10 based option, so the trade-offs are visible at a glance.

Choose this bundle when Publisher matters, when you want to match other PCs already on Office 2021, or when the lower one-time cost of the 2021 suite outweighs the longer 2024 support window. Choose the 2024 bundle when you want Office updates through 2029 and do not need Publisher. If the PC fails the Windows 11 hardware check, a Windows 10 Pro key with a separate Office key is the fallback, with the caveat that Windows 10 no longer receives security updates.

System requirements

Windows 11 sets the hardware bar. Office 2021 runs on anything that runs Windows 11. Confirm the PC meets the following before ordering:

• Processor: 1 GHz or faster, 2 or more cores, 64-bit, on the Microsoft supported list
• Memory: 4 GB RAM
• Storage: 64 GB or larger drive
• Firmware: UEFI with Secure Boot capable
• Security: TPM version 2.0
• Graphics: DirectX 12 compatible with WDDM 2.0 driver; 720p display 9 inches or larger
• Office 2021 in addition needs about 4 GB of free disk space and a 1280 x 768 display
• Internet connection for downloads, activation and updates

Most PCs from 2018 onward qualify, although TPM 2.0 is sometimes switched off in the firmware and must be enabled. Microsoft's free PC Health Check app gives a definitive answer in under a minute. Windows 11 Pro can upgrade a Windows 10 installation in place, keeping files and programs, or be installed clean from USB.

Why Windows 11 Pro rather than Home

The operating system half of the bundle is the Pro edition on purpose. Pro adds BitLocker, which encrypts the drive so a lost laptop does not expose your documents, spreadsheets and mail archive. It adds Remote Desktop hosting, so the office PC can be reached from home. It includes Hyper-V for running a virtual machine, useful for keeping an old application alive on an isolated copy of Windows. And it supports Group Policy, domain join and Microsoft Entra ID join, which matter the moment a small business grows beyond a couple of computers. For a PC that will carry a full Office Professional Plus suite with Access databases and business mail, Pro is the sensible foundation, and the cost difference inside the bundle is small.

Upgrading a Windows 10 PC with this bundle

For the most common use of this bundle, an existing Windows 10 machine, the path is straightforward. Back up your files, then run the Windows 11 Installation Assistant or mount the Windows 11 ISO from the link in your email and run setup from inside Windows 10. Choose to keep files and apps. When the upgrade completes, open Settings, System, Activation and enter the Windows 11 Pro key; if the PC was on Windows 10 Home, the key also moves it to Pro. Then uninstall the old Office or any Microsoft 365 trial, install Office 2021 Professional Plus from the second link and activate it in Word. Existing Outlook PST files, Word templates and Publisher documents carry over untouched, so the machine feels familiar with a current operating system underneath.

For a bare or refurbished PC, install Windows 11 Pro clean from a USB drive, activate, run Windows Update, then add Office. Either route usually fits inside an hour, most of it download time. Keep the delivery email: both keys and both links are what you will need for any future reinstall.

Licensing explained

Both keys in the Office 2021 and Windows 11 Pro bundle are perpetual licenses for one PC. Windows 11 Pro attaches a digital license to the hardware after activation, so reinstalling Windows on that machine reactivates automatically. Office 2021 Professional Plus activates with its own key and keeps working indefinitely; Microsoft's mainstream support for Office LTSC 2021 runs until October 13, 2026, after which the suite continues to function but stops receiving updates, as earlier perpetual versions did. Neither product requires a subscription or a Microsoft account.

Transfer rights depend on the license type of each key, listed separately in the Product Overview table because they are separate products. Retail keys can be moved to a new PC after removal from the old one; OEM keys stay with the first PC; volume keys have a set number of activations and are intended for organizations. Our FAQ page explains each type.

Why buy the bundle from Software in Store

Software in Store is an independent US reseller of genuine Microsoft product keys, operated by MAKERS UNITY LLC in Sheridan, Wyoming, and not affiliated with or endorsed by Microsoft. With a bundle, one dependable seller means one support contact for the whole machine.

• Both keys genuine, activating against Microsoft's servers and updating through Windows Update and Microsoft Update.
• Delivery by email within minutes of payment, seven days a week; both keys saved under My Account.
• Official Microsoft download links for Windows 11 and Office 2021, never modified installers.
• A person answers support@softwareinstore.com every day of the week and handles phone activation for either product.
• 30-day money-back guarantee per key: a key that cannot be activated and cannot be fixed is replaced or refunded.
• Encrypted, PCI-compliant checkout with card, Apple Pay or Google Pay.

Read Why Trust Us for how we source keys and how the guarantee is honored.

Related products

If the PC is already on Windows 11 Home and only the edition needs changing, the Windows 11 Home to Pro upgrade key is more targeted than the full bundle. Diagramming and scheduling users can pair the same generation with Project 2021 Professional on the same machine. The rest of the generation is in our Office 2021 category, and the operating systems in the Windows 11 category.

Order the Office 2021 and Windows 11 Pro bundle today

Add the bundle to your cart, pay securely, and both keys arrive by email within minutes with the official download links. Bring the PC onto Windows 11 Pro, install Office 2021 Professional Plus, activate both, and the machine is fully licensed and supported. Our How It Works page describes the process from checkout to activation, and the FAQs cover reinstalling, hardware changes and updates. One order, two perpetual keys, one properly licensed PC.