WIN-XP,突然屏幕只有桌面的背景而没有任何图标，所以鼠标在上面无法进行任何操作，
重新启动时出现如下提示窗口：
Explorer.EXE - Unable to locate component
This application has failed to start because SHDOCVW.dll was not found.
Re-installing the application may fix this.
请教，我该如何恢复桌面上的东西？
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