如何添加Messenger服务

检查有没有这个系统文件
%SystemRoot%\System32\msgsvc.dll
如果没有，从其他系统拷贝msgsvc.dll文件到system32目录下，
然后，把以下内容复制到记事本里面，另存为 msgsvc.reg 文件，注意后缀是.reg不是.txt （在文件夹选项→ 查看 里面，取消“隐藏已知文件类型的扩展名”才可以看到文件的后缀）：

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Messenger]
"Type"=dword:00000020
"Start"=dword:00000004
"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,\
00,76,00,63,00,68,00,6f,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
"DisplayName"="Messenger"
"DependOnService"=hex(7):4c,00,61,00,6e,00,6d,00,61,00,6e,00,57,00,6f,00,72,00,\
6b,00,73,00,74,00,61,00,74,00,69,00