Windows editions, licences and support dates

Some limits are set by edition and some by a date. Neither is on the product page: both come from the manufacturer’s terms and lifecycle documents, so check your own Windows version and how the licence was purchased before deciding.

Before choosing a task

  1. Check your Windows version with winver and look up when updates for it stop.
  2. Check feature by feature whether Home covers what you need or Pro is required.
  3. Put the cost and the deadline side by side for replacing, upgrading and extending.

Compare the options

Comparisons · The Windows 11 version 25H2 supported processor lists (Intel, AMD, Qualcomm), eligibility checking with PC Health Check, the scope of what Windows activation establishes, and confirming the TPM 2.0 requirement

Before buying a used business PC: how to read Windows 11's supported-CPU lists, and what "activated" does not prove

There is only so much you can check on an ex-lease business PC before it arrives. This guide separates what Microsoft's supported-processor lists are actually for, what Windows activation does not guarantee, and whether TPM is absent or merely switched off.

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Comparisons · Section 4 (Transfer), section 5 (Authorized Software and Activation) and the downgrade rights in section 7 of the Windows 11 licence terms Microsoft publishes under the OEM (pre-installed) category, in the English and Japanese editions, and what the text says about replacing parts in a self-built PC

Can a Windows licence move to a new PC? The two acquisition routes section 4 of the licence terms separates

"OEM cannot be moved, retail can" — where in the text does that come from? This guide reads section 4 of the Windows 11 licence terms Microsoft publishes, in both the English and Japanese editions, and sets out what each route is permitted to do and what conditions are attached.

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Comparisons · The published end-of-updates dates per Windows 11 version for Home and Pro editions (Microsoft Lifecycle and the Windows release health page), and checking your own version with winver

Windows 11 stops updating by version: check yours with winver against the published end dates

Each Windows 11 version has its own end of updates, and Home and Pro get 24 months from the feature update. Check your version with winver, read the right edition column in Microsoft's table, and see why version 26H1 matters when buying a new PC.

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