When process exploer is used recently, it often prompts the version of dbghelp when viewing the thread of the process. DLL configured does not support Microsoft symbol server dialog box, and then prompts you to download Windows debugging tools. I have installed Windows debugging tools before, and it is the latest. Why do I still prompt this? I searched all dbghelp. dll and found manyProgramThe DLL, such as Vs, Baidu Hi, SQL Server, and UE, are available in different versions. The latest version is in Windows debugging tools, which is 6.3.17, I put this DLL in the current directory of process exploer. It still reports this error. Is it a DLL loaded by itself. After searching on the internet, I finally found out the reason. The webpage I found is. The original process exploer is the dbghelp. dll found based on options-configure symbols. You can set the path to the dbghelp. dll in Windows debugging tools.