win8.1 installation WebAccess encountered write access error

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A few days ago suddenly want to swap with vs2013 development, re-installed win8.1 system, on the new system installation WebAccess 7.2 When the following error occurred:

The current identity (IIS Apppool\defaultapppool) does not have "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary. asp. NET Files" The Write access permission.

Description: An unhandled exception occurred during the execution of the current WEB request. Check the stack trace information For more information about the error and the source of the error in your code.

Exception Details: System.Web.HttpException: The current identity (IIS Apppool\defaultapppool) does not have a "C:\Windows\Microsoft.NET\Framework\v4.0.30319\ Temporary the Write access permission for ASP.

This error occurs because the default application pool setting for IIS is incorrect, the default program pool for win8.1 is 4.0, and you want to change it to 2.0 by changing the application pool to the IIS Configuration tool->defaultapppool-> The basic configuration is changed to v2.0.50727, OK.

win8.1 installation WebAccess encountered write access error