rebuild project: error : The schema version of 'MagicalUnicorn.MvcErrorToolkit' is incompatible with version 1.6.21205.9031 of NuGet. Please upgrade NuGet to the latest version from http://go.microsoft.com/fwlink/?LinkId=213942., The .NET Framework on this machine needs to be a newer version before installation or upgrade can continue. Please upgrade to the latest available .NET version. https://go.microsoft.com/fwlink/?linkid=2101321, You could go to your task manager and kill all the installer process, then reboot your computer and restart your Visual Studio Installer to continue the installation. Sincerely, Anna * If the answer is the right solution, please click " Accept Answer " and kindly upvote it. If you have extra questions about this answer, please click "Comment"., When i open the URL: http://go.microsoft.com/fwlink/?LinkId=115207&clcid=0x409 i see a error 404 page. Microsoft has taken the package the installer is supposed to download offline., Learn how to install .NET Framework on Windows 11, Windows 10, and Windows Server. This article also includes information about .NET Framework and unsupported versions of Windows, such as Windows 8, Windows Vista, and Windows XP. Migration Guide to .NET Framework 4.8, 4.7, and 4.6.2 - .NET Framework A guide for migrating to newer .NET Framework versions that includes resources for new features , Windows环境下激活虚拟环境报错【无法加载文件XXX因为在此 系统 上 禁止运行脚本。 有关详细信息,请参阅 https: /go.microsoft.com / fwlink/?LinkID=135170 】.