Activation & setup guides
Clear, step-by-step help for installing and activating Windows, Office and Windows Server, written by the SOS License support team.
How to activate Windows 11 or Windows 10 with a product key (Settings or CMD)Step-by-step: enter your 25-character product key in Windows 11 or Windows 10 Settings, or activate from the command line. Plus what to do if activation fails.Read guide →How to upgrade Windows 11 Home to ProUpgrade Windows 11 Home to Windows 11 Pro with a product key in a few minutes, without reinstalling and without losing your files or apps.Read guide →How to clean install Windows 11 from a USB driveCreate a Windows 11 USB installer with Microsoft's Media Creation Tool, boot from it, install Windows 11 and activate it with your product key.Read guide →How to install and activate Office 2024, Office 2021, Visio and ProjectInstall Office 2024 or Office 2021 Professional Plus, Visio 2021 or Project 2021 from the download link in your email and activate it with your product key.Read guide →Fix Windows activation errors 0xC004F074, 0xC004C008 and 0xC004F050Fix common Windows 11 and Windows 10 activation errors: 0xC004C003, 0xC004C008, 0xC004F050, 0xC004F213, 0x803F7001, 0xC004F074 and more.Read guide →Windows 11 Home vs Pro: which one do you need?Windows 11 Home vs Pro compared: BitLocker, Remote Desktop, Hyper-V, Windows Sandbox, Group Policy, domain join and memory limits. Find the right edition.Read guide →Office 2024 vs Office 2021 Professional Plus: what's the difference?Office 2024 vs Office 2021 Professional Plus compared: apps included, new features, and security update dates. Which one-time Office purchase should you buy?Read guide →Windows Server 2022 product key: how to install and activate StandardInstall Windows Server 2022 from Microsoft's evaluation ISO and activate it with a Standard product key, including converting the evaluation edition with DISM.Read guide →Office 2021 end of support (October 13, 2026): what it means and what to doOffice 2021, Visio 2021 and Project 2021 reach end of support on October 13, 2026. What still works, what stops, and your options: keep it, Office 2024 or Microsoft 365.Read guide →Windows 10 end of support: your options in 2026Windows 10 support ended on October 14, 2025. How Extended Security Updates work until October 2027, how to check if your PC can run Windows 11, and how to upgrade.Read guide →Office 2024 vs Microsoft 365: buy once or subscribe?Office 2024 vs Microsoft 365 compared: one-time purchase or subscription, apps, cloud storage, devices, updates and long-term cost. Which one is right for you?Read guide →Are cheap Windows keys legit? Retail vs OEM vs Volume keys explainedWhy Windows and Office keys cost less outside the Microsoft Store, the difference between Retail, OEM and Volume (MAK/KMS) keys, the red flags to avoid, and how to check your key.Read guide →How to find your Windows or Office product keyWhere to find your Windows 11, Windows 10 or Office product key: your purchase email, the key built into your PC, a digital license, and commands that show the installed key.Read guide →How to check if Windows and Office are activatedCheck whether Windows 11, Windows 10 and Office are activated, what each activation message means, and how to see your license type (Retail, OEM or Volume) in one command.Read guide →Office activation errors: Unlicensed Product, key already used and other fixesFix Office 2024 and Office 2021 activation problems: "Unlicensed Product", "This product key has already been used", key not valid for your Office, conflicts with Microsoft 365 and more.Read guide →How to remove the "Activate Windows" watermark permanentlyWhy the "Activate Windows – Go to Settings to activate Windows" watermark appears on Windows 11 and 10, what it limits, and the only reliable way to remove it for good.Read guide →How to reactivate Windows after a motherboard or hardware changeWindows not activated after replacing the motherboard or upgrading your PC? Use the Activation troubleshooter, re-enter a retail key, and fix errors like 0x803F7001.Read guide →How to transfer a Windows 11 or 10 license to a new PCCan you move your Windows license to a new computer? Retail vs OEM rules, how to remove the key from the old PC, and how to activate Windows on the new one. Office too.Read guide →How to install and activate Office 2024 without a Microsoft accountInstall and activate Office 2024 or Office 2021 Professional Plus with just your product key, no Microsoft account or sign-in needed. Step by step, plus how to skip the sign-in screen.Read guide →Windows 11 requirements: TPM 2.0, Secure Boot and how to check your PCWindows 11 minimum requirements explained: processor, RAM, storage, TPM 2.0 and Secure Boot. How to check your PC in two minutes and turn TPM and Secure Boot on in the BIOS.Read guide →Can you use Office 2024 on a Mac? Your options explainedOffice 2024 Professional Plus is Windows-only. Here are the ways to get Word, Excel and PowerPoint on a Mac: Office Home 2024 for Mac, Microsoft 365, or Windows in a virtual machine.Read guide →Windows 11 Home or Pro for gaming: is Pro faster?Is Windows 11 Pro better for gaming than Home? Same performance, same DirectX 12, Game Mode and Auto HDR. When Pro is worth it for gamers, and when Home is all you need.Read guide →Convert Windows Server 2022 Evaluation to Standard (DISM command)Turn a Windows Server 2022 Evaluation install into the full Standard edition without reinstalling: check your edition, run DISM /Set-Edition with your product key, then activate. Includes fixes for common errors.Read guide →Windows 11 Pro vs Enterprise: what's the difference and which do you need?Windows 11 Pro vs Enterprise compared: features, licensing, price and who each edition is for. Why Enterprise isn't sold as a one-time key, and why cheap "Enterprise keys" are risky.Read guide →Office Standard vs Professional Plus (2021 and 2024): which apps are included?Office LTSC Standard vs Professional Plus for 2021 and 2024 compared app by app: Word, Excel, PowerPoint, Outlook, OneNote, Access, Publisher. Which edition to choose.Read guide →