我在windows上使用github for windows，我打开安装之后的Git Shell,得到如下图一所示警告，而且git命令不能使用，报如下图二所示错。
我已将github卸载重装过，重装之后还是同样的情况。
我在C盘搜索出所有和git相关的文件或文件夹，并删除掉了，然后再次安装github for windows，还是报错。
Couldn't open /dev/null or dup failed:No such file or directory是什么意思？
Github4win的文件结构如下图图三所示，没有类似/dev/null的目录结构。
再将github使用360卸载之后，安装上
，也是报Couldn't open /dev/null or dup failed:No such file or directory这个错误，git命令不能使用。
求助：怎样能恢复git的使用？
伊谢尔伦2017-05-02 09:23:37
Finally found the answer on this website: http://www.itnose.net/detail/6336096.html
Solution:
Take win7 as an example, right-click Computer-Manage-View, check Show hidden devices:
Click for Non-Plug and Play Drivers
Right-click on Null-Properties-Driver-If it is already started, click Stop, then click Start, and select Start as the type
Finally restart the computer and you’re done.
淡淡烟草味2017-05-02 09:23:37
Download this and install it https://github.com/msysgit/msysgit/releases/download/Git-1.9.5-preview...