The IIS Web site or system CAPTCHA does not display the problem-"managed handlers are used, but ASP. NET is not installed or fully installed"

On the IIS published a system, but the login page verification code picture has not come, try various methods, permissions, paths, inherit the parent classpath, etc. do not work, into the login.html, to the image of no verification code icon, right-copy the image URL, paste to the Address bar, the following error occurred:

Error summary
HTTP Error 500.21-internal Server error
Handler "webservicehandlerfactory-integrated" has an error module "Managedpipelinehandler" in its list of modules detailed error message
Module IIS Web Core
Notify Executerequesthandler
Handler webservicehandlerfactory-integrated
Error code 0X8007000D
The requested URL Http://localhost:80/Ashx/VCode.ashx
Physical path D:xxxxxx\ashx\vcode.ashx
Login Method Anonymous
Login User Anonymous
The most probable cause:
The managed handler is used, but ASP. NET is not installed or completely installed.
There is a typographical error in the configuration of the handler module list.
Actions you can try:
? If you want to use a managed handler, install ASP.
? Make sure that the name of the handler module is specified correctly. The module name is case-sensitive and uses the modules= "Staticfilemodule,defaultdocumentmodule,directorylistingmodule" format.
Links and more information the IIS kernel does not recognize this module.
See more information?

This is caused by an incomplete installation of the ASP.

Solution:

CMD under Input:

"%windir%\microsoft.net\framework\v4.0.30319\aspnet_regiis.exe"-iru-enable

Transfer from http://blog.csdn.net/baidu_27474941/article/details/52368144

The IIS Web site or system CAPTCHA does not display the problem-"managed handlers are used, but ASP. NET is not installed or fully installed"