尝试在VS Community 2015更新上安装.Net Core 3.我遇到以下错误。尝试手动下载和复制msi文件（AspNetCoreLocalFeed_.msi）但正在动态创建日志文件中看到的目标文件夹，因此它不起作用。还尝试手动安装它。什么都行不通。
通过不同网站上的各种线程了解安装错误，但找不到任何类似问题的答案。非常感谢任何帮助。
[23F8:2DD8][2016-11-08T22:02:58]w343: Prompt for source of package: AspNetCoreLocalFeed, payload: AspNetCoreLocalFeed, path: C:\Users\Faisal\Downloads\packages\AspNetCoreLocalFeed_.msi
[23F8:2DD8][2016-11-08T22:02:58]i338: Acquiring package: AspNetCoreLocalFeed, payload: AspNetCoreLocalFeed, download from: https://download.microsoft.com/download/5/5/7/557D02A5-C3D0-4EF6-A570-4F75CD0DA5BF/packages/AspNetCoreLocalFeed_.msi
[0190:0850][2016-11-08T22:05:07]e000: Error 0x80070490: Process returned error: 0x490
[0190:0850][2016-11-08T22:05:07]e000: Error 0x80070490: Failed to execute EXE package.
[23F8:3008][2016-11-08T22:05:07]e000: Error 0x80070490: Failed to configure per-machine EXE package.
[23F8:3008][2016-11-08T22:05:07]i319: Applied execute package: DotNetCLI_x64, result: 0x80070490, restart: None
[23F8:3008][2016-11-08T22:05:07]e000: Error 0x80070490: Failed to execute EXE package.
[0190:0850][2016-11-08T22:05:07]i351: Removing cached package: DotNetCLI_x64, from path: C:\ProgramData\Package Cache\8B4ACC662D4A8759AB418CA5F92FE4721D21B190\
[23F8:2DD8][2016-11-08T22:05:07]e000: Error 0x80070642: Failed attempt to download URL: 'https://download.microsoft.com/download/5/5/7/557D02A5-C3D0-4EF6-A570-4F75CD0DA5BF/packages/AspNetCoreLocalFeed_.msi' to: 'C:\Users\Faisal\AppData\Local\Temp\{B803D3CE-B0AC-4779-8D29-E1D7B9070031}\AspNetCoreLocalFeed'
[23F8:2DD8][2016-11-08T22:05:07]e000: Error 0x80070642: Failed to acquire payload from: 'https://download.microsoft.com/download/5/5/7/557D02A5-C3D0-4EF6-A570-4F75CD0DA5BF/packages/AspNetCoreLocalFeed_.msi' to working path: 'C:\Users\Faisal\AppData\Local\Temp\{B803D3CE-B0AC-4779-8D29-E1D7B9070031}\AspNetCoreLocalFeed'
[23F8:2DD8][2016-11-08T22:05:07]e313: Failed to acquire payload: AspNetCoreLocalFeed to working path: C:\Users\Faisal\AppData\Local\Temp\{B803D3CE-B0AC-4779-8D29-E1D7B9070031}\AspNetCoreLocalFeed, error: 0x80070642.
答案 0 :(得分：0)
只是为了帮助某人提供更新。重新安装Visual Studio后安装成功。