首先，将您原来的注册表导出，步骤如下：

　　1. 单击开始按钮，在搜索框内输入regedit，按回车键。

　　2. 在注册表编辑器中，依次展开至HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\wuauserv，右键wuauserv选择导出，单击左侧窗格中的桌面作为保存路径，输入regbackup作为文件名，点击保存。

　　然后再导入注册表，注册表导入步骤：

　　1.创建一个文本文档

　　2.将以下代码粘帖到文档中：

　　Windows Registry Editor Version 5.00

　　[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\wuauserv]

　　"PreshutdownTimeout"=dword:036ee800

　　"DisplayName"="@%systemroot%\\system32\\wuaueng.dll,-105"

　　"ImagePath"=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,00,73,\

　　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,00,20,00,6e,00,65,00,74,00,73,00,76,00,63,00,73,00,00,00

　　"Description"="@%systemroot%\\system32\\wuaueng.dll,-106"

　　"ObjectName"="LocalSystem"

　　"ErrorControl"=dword:00000001

　　"Start"=dword:00000002

　　"DelayedAutoStart"=dword:00000001

　　"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):53,00,65,00,41,00,75,00,64,00,69,00,74,00,50,00,72,\

　　00,69,00,76,00,69,00,6c,00,65,00,67,00,65,00,00,00,53,00,65,00,43,00,72,00,\

　　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,00,65,00,67,00,65,00,00,00,53,00,65,00,43,00,72,00,65,00,\

　　61,00,74,00,65,00,50,00,61,00,67,00,65,00,46,00,69,00,6c,00,65,00,50,00,72,\

　　00,69,00,76,00,69,00,6c,00,65,00,67,00,65,00,00,00,53,00,65,00,54,00,63,00,\

　　62,00,50,00,72,00,69,00,76,00,69,00,6c,00,65,00,67,00,65,00,00,00,53,00,65,\

　　00,41,00,73,00,73,00,69,00,67,00,6e,00,50,00,72,00,69,00,6d,00,61,00,72,00,\

　　79,00,54,00,6f,00,6b,00,65,00,6e,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,\

　　00,00,00,53,00,65,00,49,00,6e,00,63,00,72,00,65,00,61,00,73,00,65,00,51,00,\

　　75,00,6f,00,74,00,61,00,50,00,72,00,69,00,76,00,69,00,6c,00,65,00,67,00,65,\

　　00,00,00,53,00,65,00,53,00,68,00,75,00,74,00,64,00,6f,00,77,00,6e,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,\

　　00,01,00,00,00,60,ea,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00

　　[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\wuauserv\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,\

　　77,00,75,00,61,00,75,00,65,00,6e,00,67,00,2e,00,64,00,6c,00,6c,00,00,00

　　"ServiceMain"="WUServiceMain"

　　"ServiceDllUnloadOnStop"=dword:00000001

　　[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\wuauserv\Security]

　　"Security"=hex:01,00,14,80,78,00,00,00,84,00,00,00,14,00,00,00,30,00,00,00,02,\

　　00,1c,00,01,00,00,00,02,80,14,00,ff,00,0f,00,01,01,00,00,00,00,00,01,00,00,\

　　00,00,02,00,48,00,03,00,00,00,00,00,14,00,9d,00,02,00,01,01,00,00,00,00,00,\

　　05,0b,00,00,00,00,00,18,00,ff,01,0f,00,01,02,00,00,00,00,00,05,20,00,00,00,\

　　20,02,00,00,00,00,14,00,ff,01,0f,00,01,01,00,00,00,00,00,05,12,00,00,00,01,\

　　01,00,00,00,00,00,05,12,00,00,00,01,01,00,00,00,00,00,05,12,00,00,00

　　3.保存该文档，将后缀改为 .reg 形式

　　4.双击保存的注册表文件便能完成导入。