The handler "PageHandlerFactory-Integrated" has an error module in its module list "

Today, on the site where the windowsServer server is installed, when everything is done, it appears: the handler "PageHandlerFactory-Integrated" has an error module "ManagedPipelineHandler" in its module list. The system uses .net 4.0, obviously used the installation version to install, the installation process does not have any error prompt, why? To the Microsoft official website to check, only to know: 4.0 framework is independent CLR, and 2.0 is different, if you want to run 4.0 site, in some cases need to use aspnet_regiis to register 4.0 framework, and then use 4.0 Class pool, you can run 4.0 web project. But I didn't have this step in my last installation. Whatever, let's try it! Find the installation path of .net 4.0, I am windowsServer2008R2 64Bit Aliyun's machine, the directory is under C:\ Windows\ Microsoft.NET\ Framework64\ v4.0.30319\, if it is a 32-bit machine, it should be under C:\ Windows\ Microsoft.NET\ Framework\ v4.0.30319\; start cmd (hold down "win + R", type "cmd", and then enter); execute program: aspnet_regiis.exe-I; register the 4.0 framework through aspnet_regiis. If all goes well, the following will appear:

OK, the website opens normally, everything is going well!