Windows Update 失敗顯示錯誤碼 80246008，主因是 EventSystem 服務登錄檔設值損毀。匯入以下登錄檔修復鍵值即可解決。

修復登錄檔內容

1. 新建文字文件，貼入以下完整內容：

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\EventSystem]
"DisplayName"="@comres.dll,-2450"
"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,00,73,00,76,00,63,00,68,00,6f,00,73,00,74,00,2e,00,65,00,78,00,65,00,20,00,2d,00,6b,00,20,00,4c,00,6f,00,63,00,61,00,6c,00,53,00,65,00,72,00,76,00,69,00,63,00,65,00,00,00
"Description"="@comres.dll,-2451"
"ObjectName"="NT AUTHORITY\\LocalService"
"ErrorControl"=dword:00000001
"Start"=dword:00000002
"Type"=dword:00000020
"DependOnService"=hex(7):72,00,70,00,63,00,73,00,73,00,00,00,00,00
"ServiceSidType"=dword:00000001
"RequiredPrivileges"=hex(7):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,00,65,00,67,00,65,00,00,00,53,00,65,00,49,00,6d,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
"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,e8,03,00,00,01,00,00,00,88,13,00,00,00,00,00,00,00,00,00,00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\EventSystem\Parameters]
"ServiceDll"=hex(2):25,00,73,00,79,00,73,00,74,00,65,00,6d,00,72,00,6f,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,00,65,00,73,00,2e,00,64,00,6c,00,6c,00,00,00
"ServiceDllUnLoadOnStop"=dword:00000001

2. 存為 FixEventSystem.reg → 雙擊匯入 → 確認 → 重開機嘗試更新。

警告：修改登錄檔有風險，操作前請先匯出 HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\EventSystem 分支備份。更多教程請關注三聯電腦教程欄位，歡迎加入辦公群：189034526。