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.

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。

进入任务管理器。进程下查找vn。单击“结束进程”。

我已经打开visual studio安装程序，单击修改，并启动visual studio。这解决了问题。

我在Visual Studio 2017中遇到了这个问题。任务管理器中有名为VSIXAutoUpdate.exe的进程。我看着任务管理器，它们在刷出和消失。有几次，Visual Studio 2017进程会生成和消失。

VSIX Auto Updater在任务管理器中停止显示后，它应用了所有的后台更新，我可以启动Visual Studio。

我不建议像这个问题的其他答案所建议的那样，在安装更新的过程中杀死这些进程。只要等待，直到他们完成任务管理器。

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