Windows 8.1

Out of support since January 2023 — unlike Windows 7 or 10, Microsoft never offered any Extended Security Updates program for 8.1 at all, consumer or business.

end-of-lifelegacyno-ESU-ever-offeredダウンロード／アップグレード ↗公式ページ ↗ライフサイクル／サポート文書 ↗

プラットフォーム

Windows

リリース日

October 2013

サポート終了日

January 10, 2023 (no Extended Security Updates program was ever offered for it)

システム要件

1 GHz CPU, 1GB RAM (32-bit) / 2GB RAM (64-bit), 16GB-20GB storage, DirectX 9 GPU with WDDM driver.

Windows 8.1 was Microsoft's course-correction release after Windows 8's controversial tablet-first interface, restoring a Start button and letting the system boot directly to the desktop. It reached its final end of support on January 10, 2023, and notably, Microsoft never made any Extended Security Updates program available for it the way it did for Windows 7 and later Windows 10 -- once support ended, there was no paid path to keep receiving patches at all. It's still occasionally found on older tablets and budget laptops from its era that were never upgraded.

リリース日、サポート期間、システム要件はMicrosoftおよびAppleの公式ライフサイクルページ（上記リンク）に基づいています — サポートポリシーは随時変更されるため、本番環境や企業での意思決定にこれらの情報を利用する前に、必ず公式ページでご確認ください。