故障分析：

　　可能是Software Protection服務(wù)丟失，即在services中無法找到該服務(wù)。

　　解決方法：

　　1、按”Win+R”組合鍵，調(diào)出運(yùn)行框，輸入: services.msc 并回車，查找Software Protection服務(wù)；

　　2、如果找不到Software Protection服務(wù)，通過導(dǎo)入Software Protection鍵值，重建Software Protection服務(wù)，來解決該問題；

　　3、新建一個記事本文件，將以下文字復(fù)制粘貼到記事本中，以“SP.reg”命名并保存于桌面；

　　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

　　4、請您雙擊“SP.reg”，當(dāng)系統(tǒng)提示您是否確認(rèn)導(dǎo)入注冊表時，請點(diǎn)擊“是”，之后會有提示說明已經(jīng)成功導(dǎo)入注冊表；

　　5、重啟后，再次進(jìn)入”服務(wù)”控制面板查看，可以找到Software Protection服務(wù)，右擊并選擇啟用。

　　備注：Software Protection是一個重要的服務(wù)，Win8系統(tǒng)提示無效的產(chǎn)品密鑰，且報錯0x80070424都是由此服務(wù)丟失導(dǎo)致的。

       以上就是對Win8系統(tǒng)提示無效的產(chǎn)品密鑰錯誤代碼0x80070424的故障分析及解決方法的介紹，，用戶通過上述方法，導(dǎo)入修改注冊表便可恢復(fù)這項服務(wù)。