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。

尝试检查任务管理器并杀死任何与Visual Studio相关的进程(任何版本)。

更新: 正如许多人在评论中提到的，最好等一段时间，直到这些过程自己结束

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.

按Win+R，输入%temp%，然后删除所有文件，并重新启动Visual studio。

勾选“为所有项目执行此操作”，如果需要按跳过按钮。

你也可以启动Visual Studio安装程序。安装程序似乎可以修复任何背景问题。然后，您可以从安装程序启动Visual Studio。

我刚才用这种方法解决了我的问题。

给点时间再试一次。 在任务管理器中结束与visual studio相关的所有任务。 如果这两个解决方案都不工作，那么重新启动机器，它肯定会工作。