http://social.technet.microsoft.com/Forums/en-US/ieitprocurrentver/thread/3d74bc03-b0c4-4ec1-88df-b938ec82c159/原来是注册表...
[问题处理]Windows 8.1 处理无法更换锁屏壁纸的问题
原始链接：http://answers.microsoft.com/en-us/windows/forum/windows8_1-desktop/lockscreen-issues-on-windows-81/c51f570a-7a6...