你好，
错误信息明确表示这两个包下载失败了，你可以去控制面板找出你的VS，右击然后选择修复。
如果这种修复不行，我建议你到官方网站下载一个新的ISO 然后用FCIV验证它的哈希值，确保和官方的哈希值匹配，你的安装包完整无误后重新下载。
从下面网址下载这个工具，按照里面的步骤运行。
https://support.microsoft.com/en-us/kb/841290
下面是微软官方的哈希值链接：
https://www.visualstudio.com/en-us/downloads/visual-studio-2015-iso-sha1-vs.aspx
记得关闭杀毒软件防火墙，用管理员权限运行安装文件。
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