如果您的问题确实与缓存程序集有关，则它们很可能位于以下位置:

If your problem is indeed with cached assemblies, they would most likely be located here:

%userprofile%\local Settings\Application Data\assembly

保留该文件夹中的文件夹结构(即 dl3 ， temp ， tmp )，但清除该目录下的所有文件和文件夹那三个文件夹.

Preserve the folder structure in that folder (another words, dl3, temp, tmp), but clear out any files and folders under those 3 folders.

在执行此操作之前，请记住要通过TaskManager/Processes选项卡关闭PowerPoint的所有实例.仅仅关闭应用程序还不够好-您必须查找正在运行的PowerPoint进程的每个实例.

Remember to close all instances of PowerPoint via TaskManager/Processes tab before you do this. Closing the application alone is not good enough - you must hunt down every instance of the PowerPoint process that are running.