卸载 vs2015
然后：
1. 删除文件夹
•C：\ Program Files（x86）\ Microsoft Visual Studio 14.0
•C：\ Program Files \ Microsoft Visual Studio 14.0
•C：\ users \ user \ Documents \ Visual Studio 2015
•C：\ users \ user \ AppData \ Roaming \ Microsoft \ VisualStudio \ 14.0
•C：\ users \ user \ AppData \ Local \ Microsoft \ VisualStudio \ 14.0
•C：\ users \ user \ AppData \ Local \ Microsoft \ VSCommon \ 14.0
2. 删除注册表
•HKEY_LOCAL_MACHINE \ SOFTWARE \ Wow6432Node \ Microsoft \ VisualStudio \ 14.0
•HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \ VisualStudio \ 14.0
•HKEY_CURRENT_USER \ Software \ Microsoft \ VisualStudio \ 14.0
•HKEY_CURRENT_USER \ Software \ Microsoft \ VisualStudio \ 14.0_Config
3. 清除缓存
清除文件夹 C:\ProgramData\Package Cache（此为隐藏文件）下的文件
重新安装vs2015
