Solve the problem that the msdn installation is normal, but it cannot be accessed.

I don't know when msdn is unavailable. I keep prompting you that the page you accessed does not exist or has been deleted.

Try S:

A few questions were encountered, and Google did not find the answer n times.

Later found that as long as the MS-HELP can not access,

So confirm that the installation is not a problem (depressed that I tried to install it n times before)

Google does not know why it cannot be found.

I don't know the problem. I thought it was an IE problem. I almost wanted to reinstall IE.

I finally found

Asynchronous pluggable protocols

.

Common protocols: HTTP and https

The MS-http protocol is defined in the Registry hkey_classes_root \ Protocols \ Handler.

So I knew what to do, and then I started the machine, found the registry, and copied it to the local machine.