This installation has not been configured properly for Software Updates

　　从Eclipse中安装软件时弹出对话框提示“Cannot complete the request.This installation has not been configured properly for Software Updates.See the error log for details.”

　　如图：

　　此错误的原因是eclipse/p2/org.eclipse.equinox.p2.engine文件夹中的内容有问题，重新copy一份正确的内容即可。