Win8.1 system installation webaccess 7.2 encountered write access error

When I was in college, I used to play games in my free time. Now that I am working, I will share the problems and learning experiences I have encountered at work. If there is something wrong, please let me know, thank you! A few days ago, I suddenly wanted to switch to vs2013 development, and reinstalled the win8.1 system. When I installed webaccess 7.2 on the new system, I got the following error: The current identifier (IIS APPPOOL\\DefaultAppPool) does not have "C:\\Windows" \\Microsoft.NET\\Framework\\v4.0.30319\\Temporary ASP.NET Files” write access. Explanation: An unhandled exception occurred during the execution of the current web request. Check the stack trace information for details about the error and the source of the error in the code. Exception Details: System.Web.HttpException: The current identity (IIS APPPOOL\\DefaultAppPool) does not have write access to “C:\\Windows\\Microsoft.NET\\Framework\\v4.0.30319\\Temporary ASP.NET Files”. This error occurs because IIS's default application pool setting is incorrect. The default program pool for win8.1 is 4.0. Change it to 2.0. Modify the method: Go to the IIS configuration tool and put the application pool->DefaultAppPool-> The basic configuration is changed to v2.0.50727, it is OK.