Windows 8.1 Proは、スタートボタンの復活、マルチタスクの改善、デスクトップ統合の強化により、Windows 8のエクスペリエンスを洗練しました。タッチ対応の機能を備え、最新のセキュリティを必要とするシステムに最適です。
提供内容
復活したスタートボタン — モダンなライブタイル統合による使い慣れたナビゲーション
強化されたマルチタスク — 最大4つのアプリを同時に画面にスナップ
ドメイン参加とグループポリシー — ビジネスネットワーク環境向けのエンタープライズ管理
BitLocker暗号化 — ビジネスおよび個人データを保護するフルディスク暗号化
Windows To Go — USBドライブからWindows環境全体を起動
Hyper-V仮想化 — サードパーティ製ソフトウェアなしでネイティブに仮想マシンを実行
Windows 8.1 Proを選ぶ理由
Windows 8.1 Proは、最新のセキュリティ基準に対応しつつ、古いハードウェアでも軽快に動作し、Windows 10/11をサポートしないソフトウェアとの互換性も備えた、ユニークな立ち位置を占めています。タッチ最適化されたインターフェースは、Windows 8時代のタブレットや2-in-1デバイスに最適です。
最適な用途
古いハードウェア — 軽量で最適化されたOSで最高のパフォーマンスを発揮
タッチデバイス — Windows 8時代のデバイス（Surface Pro 1/2/3、Dell Venueなど）
What are the system requirements for Microsoft Windows 8.1 Pro?
Microsoft Windows 8.1 Pro requires Windows 10/11, at least 4 GB of RAM (though 8 GB is recommended), and 2 GB of free storage space. An internet connection is needed for download and activation.
What kind of license do I get with Microsoft Windows 8.1 Pro from Lizensa?
Your Microsoft Windows 8.1 Pro license is a perpetual (lifetime) license — buy once and use forever on one device. This means no recurring fees or subscriptions. You'll also receive free updates and security patches from Lizensa.
What's included with my Microsoft Windows 8.1 Pro purchase from Lizensa?
Your purchase includes a genuine Microsoft Windows 8.1 Pro license key, a download link from the official Microsoft website, step-by-step activation instructions, a VAT invoice (EU), and lifetime access to the key in your Lizensa account. All keys are authentic and backed by our 14-day money-back guarantee.
Why is Microsoft Windows 8.1 Pro so much cheaper on Lizensa?
At just €12.99, our Microsoft Windows 8.1 Pro license is up to 86% cheaper than retail because we buy in wholesale volume from European distribution channels and pass the savings directly to you. You get the exact same genuine product — just without the retail markup.
How do I install and activate Microsoft Windows 8.1 Pro from Lizensa?
After purchase, you'll receive a download link and license key by email. Download the software from the official Microsoft website, enter your key during installation or in the activation menu, and follow the guided setup. Full instructions are included with your purchase.
Is Microsoft Windows 8.1 Pro compatible with my operating system?
Microsoft Windows 8.1 Pro is compatible with current versions of Windows and macOS. Please check the system requirements section on this page before purchasing. Most modern PCs and Macs meet or exceed the minimum requirements.
How quickly will I receive my license key from Lizensa?
Your license key is delivered instantly via email after payment is confirmed — typically within 30 seconds. You'll also find it in your Lizensa account dashboard under My Library.
Are Lizensa license keys genuine and legal in the EU?
Yes. Our licenses are sourced through European distribution channels and come with a VAT invoice. The EU Court of Justice (UsedSoft v Oracle, C-128/11) has confirmed that software license resale is legal within the European Economic Area.
What is Lizensa's refund policy?
We offer a 14-day money-back guarantee on all licenses. If you encounter any issues with activation or the product doesn't meet your needs, contact our support team for a full refund — no questions asked.
productDetail.faq.activation.question
After purchase, you'll receive an email with your license key and step-by-step activation instructions. Simply enter the key during installation or in your system's activation settings. Most activations take under 2 minutes.
Do I get support with my Lizensa purchase?
Absolutely. Our multilingual support team responds within one hour during business hours. We can assist with installation, activation troubleshooting, and license questions via email in English, German, French, Spanish, Italian, Dutch, and Polish.
