很可能Visual Studio正在更新，就像错误消息暗示的那样，如果你等待几分钟更新完成，你应该能够再次运行Visual Studio而没有问题。

If the problem persists or if you're just curious, open up your task manager and see if there is anything related to (Microsoft) Visual Studio running but don't just kill the process. Check instead if the process is using any resources - if it has a high I/O count, then it's actually updating and you should let it do its thing. If CPU-usage and memory usage remain mostly constant and there is no disk activity for the process for several minutes, this could mean that the process is stuck. You might have to kill it, but proceed with caution. Hopefully if this is an update for Visual Studio, the process name should include a version number or some sort of indication of what kind of update is being applied that you can use to search for more information through a search engine or through Microsoft's online resources.

重启系统就行了，对我有用。

我发现“缓解”痛苦的唯一方法是打开win 10任务管理器，右键单击VSIXAutoUpate.exe，在上下文菜单中选择进入详细信息，右键单击VSIXAutoUpate.exe，再次在上下文菜单中选择设置优先级并选择实时......正如我所说，这是为了减轻痛苦，而不是结束痛苦

它是扩展自动更新处理正在运行。你可以杀死他们或等待他们完成(推荐)

不完全是对最初问题的回答，但如果你真的需要在安装过程中运行VS，你可以使用未记录的/AllowDuringSetup命令行开关(风险自负)。

打开任务管理器并停止Visual Studio进程。

Clear out %temp% folder, and re-started VS2019.

这对我很管用。