Win8 提示「無效的產品金鑰」錯誤碼 0x80070424？匯入登錄檔重建 Software Protection 服務修復授權

故障現象

Win8 系統啟動或變更產品金鑰時，彈出錯誤代碼 0x80070424，並提示「無效的產品金鑰」。檢查服務（services.msc）中找不到 Software Protection（sppsvc） 服務，導致授權機制無法運作。

根本原因

Software Protection 服務負責管理 Windows 授權啟用、金鑰驗證等核心功能。此服務的登錄機碼遺失或損毀（常見於最佳化工具誤刪、病毒破壞、系統更新失敗），導致服務消失，進而引發 0x80070424 錯誤。

修復步驟：匯入登錄檔重建服務

1. 按 Win+R 開啟「執行」，輸入 services.msc 確認是否找不到 Software Protection 服務。
2. 建立修復登錄檔：開啟記事本，將下列完整內容複製貼上，存檔為 SP.reg（編碼選 ANSI 或 UTF-8），放置於桌面。

   Windows Registry Editor Version 5.00
   
   [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\sppsvc]
   "StartProtected"=dword:00000001
   "DisplayName"="@%SystemRoot%\system32\sppsvc.exe,-101"
   "ErrorControl"=dword:00000001
   "ImagePath"=hex(2):25,00,53,00,79,00,73,00,74,00,65,00,6d,00,52,00,6f,00,6f,00,74,00,25,00,5c,00,73,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,73,00,70,00,70,00,73,00,76,00,63,00,2e,00,65,00,78,00,65,00,00,00
   "Start"=dword:00000002
   "Type"=dword:00000010
   "Description"="@%SystemRoot%\system32\sppsvc.exe,-100"
   "DependOnService"=hex(7):52,00,70,00,63,00,53,00,73,00,00,00,00,00
   "ObjectName"="NT AUTHORITY\NetworkService"
   "ServiceSidType"=dword:00000001
   "RequiredPrivileges"=hex(7):53,00,65,00,41,00,75,00,64,00,69,00,74,00,50,00,72,00,69,00,76,00,69,00,6c,00,65,00,67,00,65,00,00,00,53,00,65,00,43,00,68,00,61,00,6e,00,67,00,65,00,4e,00,6f,00,74,00,69,00,66,00,79,00,50,00,72,00,69,00,76,00,69,00,6c,00,65,00,67,00,65,00,00,00,53,00,65,00,43,00,72,00,65,00,61,00,74,00,65,00,47,00,6c,00,6f,00,62,00,61,00,6c,00,50,00,72,00,69,00,76,00,69,00,6c,00,65,00,67,00,65,00,00,00,53,00,65,00,49,00,6d,00,70,00,65,00,72,00,73,00,6f,00,6e,00,61,00,74,00,65,00,50,00,72,00,69,00,76,00,69,00,6c,00,65,00,67,00,65,00,00,00,00,00
   "DelayedAutoStart"=dword:00000001
   "FailureActions"=hex:80,51,01,00,00,00,00,00,00,00,00,00,03,00,00,00,14,00,00,00,01,00,00,00,c0,d4,01,00,01,00,00,00,e0,93,04,00,00,00,00,00,00,00,00,00
   
   [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\sppsvc\Security]
   "Security"=hex:01,00,14,80,a0,00,00,00,ac,00,00,00,14,00,00,00,30,00,00,00,02,00,1c,00,01,00,00,00,02,80,14,00,ff,01,0f,00,01,01,00,00,00,00,00,01,00,00,00,00,02,00,70,00,05,00,00,00,00,00,14,00,ff,01,02,00,01,01,00,00,00,00,00,05,12,00,00,00,00,00,18,00,fd,01,0f,00,01,02,00,00,00,00,00,05,20,00,00,00,20,02,00,00,00,00,14,00,9d,01,02,00,01,01,00,00,00,00,00,05,04,00,00,00,00,00,14,00,9d,01,02,00,01,01,00,00,00,00,00,05,06,00,00,00,00,00,14,00,14,00,00,00,01,01,00,00,00,00,00,05,0b,00,00,00,01,01,00,00,00,00,00,05,12,00,00,00,01,01,00,00,00,00,00,05,12,00,00,00
   
   [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\sppsvc\TriggerInfo]
   [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\sppsvc\TriggerInfo\0]
   "Type"=dword:00000014
   "Action"=dword:00000001
   "GUID"=hex:da,8a,52,f5,5f,be,14,4f,8a,ef,a9,5d,e7,28,11,61
   

3. 雙擊 SP.reg，系統詢問是否匯入登錄表時點選「是」，等待提示「已成功匯入登錄表」。
4. 重新啟動電腦。
5. 再次開啟 services.msc，確認 Software Protection 服務已出現，以滑鼠右鍵選擇「啟動」，並將啟動類型設為「自動」。

結語

Software Protection 服務是 Windows 授權體系的核心，缺失會導致無法啟動、變更金鑰、甚至系統功能受限。透過匯入上述完整登錄機碼，可完整重建該服務，徹底解決 0x80070424 錯誤。操作前建議備份登錄表以防萬一。