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Buying a Windows 11 Pro key: how it works

Buying a Windows 11 Pro key is straightforward once you know the process. Here we explain step by step what's included, how activation works and what happens if something goes wrong.

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Buying a Windows 11 Pro key: what's included, how activation works and what the activation guarantee means. Explained step by step.

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The purchase process step by step

  • Select a licence and pay. Add Windows 11 Pro to the cart, pay with TWINT, card, Apple Pay or Google Pay.
  • Receive the key by email. The 25-character genuine Microsoft key usually arrives within a few minutes of payment being received.
  • Use the setup file. Use the included link to download the Microsoft-signed setup file, for a clean install or an upgrade.
  • Activate. Enter the key in Settings under System and Activation. Windows verifies it against Microsoft's servers.

What the activation guarantee means

During activation, in rare cases there may be follow-up checks, for example after a hardware change. Most of these situations are routine and resolved in a few minutes, often via Microsoft's automated phone activation system.

Should a licence still fail to activate permanently despite support assistance, the activation guarantee applies: you receive a free replacement key or your money back. That puts the risk on us, not on you.

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What is included with a Windows 11 Pro key?

The 25-character genuine Microsoft key, access to the Microsoft-signed setup file and activation instructions in German, plus the VAT invoice.

How do I activate Windows 11 Pro?

Enter the key in Settings under System and Activation. Windows checks it against Microsoft's server and unlocks the full functionality.

What happens if activation does not work?

Our German-speaking support helps free of charge. If the problem cannot be resolved permanently, you get a replacement key or your money back.
About Keywi24

Keywi24 is a Swiss online shop for verified pre-owned Microsoft and antivirus software licences. The team has in-depth market knowledge from over five years of experience. Our goal is not to become the largest licence shop, but the most trusted.

That’s why we don’t invest in marketing hype, but in 90 days of real technical support after every purchase. Legal basis: CJEU ruling C-128/11 (03.07.2012) and Art. 12 para. 2 URG.

Mon–Fri 08:00–18:00 CET+41 800 20 00 07 (free)Live chat response usually <5 min90-day money-back guarantee