Restore source code viewer of IE8

After the installation of various well-known and unknown text editing software, IE8's default source code editor is also changed many times

In fact, IE8 does not use notepad by default. The viewer with syntax highlighting and row number functions is very useful, similar to the FF viewer. In addition, it occupies a small amount of resources and runs very quickly. Therefore, I plan to recover the service and I have no answer after searching for the Internet for a long time.

First, the IE option is not set in the default program. At present, there is no good way to change the registry, and it is relatively simple to change the registry.
HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \ Internet Explorer \ View Source Editor \ Editor Name
The default is the source code editor. The default program in IE8 is not, so I simply deleted the default one.

Now the IE8 editor is restored.