原始链接：http://answers.microsoft.com/en-us/windows/forum/windows8_1-desktop/lockscreen-issues-on-windows-81/c51f570a-7a69-4e92-8348-3ebbed778592
个人处理方法
打开注册表管理器，找到HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion
删除下面的lock screen，添加注册表
https://mega.nz/#!ToUmES7Y!vCzx4C3Br_bg8dC1uYSeCVS2FN2mLN9-1gHvBzqXi0c
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| Windows Registry Editor Version 5.00
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Lock Screen]
"ImageId_A"="{9F5E9C6C-8359-4271-81D0-2B72817D3CDF}"
"Details_A"="ROAMING"
"ImageId_B"="{4F9143FC-E200-44C8-A55B-39084FB5C3C0}"
"Details_B"="APPID:FileManager_cw5n1h2txyewy!Microsoft.Windows.PhotoManager"
"ImageId_C"="{7C104D7F-E472-42CB-BE45-436218EEC483}"
"Details_C"="APPID:FileManager_cw5n1h2txyewy!Microsoft.Windows.FileManager"
"ImageId_D"="{F4BE80C1-0EBB-47F7-841A-E3F766DB1550}"
"Details_D"="APPID:FileManager_cw5n1h2txyewy!Microsoft.Windows.FileManager"
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Lock Screen\FeedManager]
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Lock Screen\FeedManager\Feeds]
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Lock Screen\FeedManager\Selected]
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