在虚拟机中打开Microsoft Visual Studio Enterprise 2019 Version 16.4.2时，我也遇到了同样的问题。

以下是我的解决方案，这就是我所做的，它对我很有效:

不要在任务管理器中杀死任何与Visual Studio相关的进程，因为它可能会导致意想不到的行为，甚至让你重新安装 有时是Visual Studio。所以只需等待5到10分钟。所有的 与Visual Studio相关的进程将自动结束。

现在打开你的视觉工作室，它将正常工作。

进入任务管理器，结束VS Auto Update任务。它会工作得很好。

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。

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)。

重启系统就行了，对我有用。

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.