Activate/De-activate Intelligent menu

When the Intelligent Menu is activated in Internet Explorer, a message pops up that states it
can be turned of using the Internet Options, but while using the Classic Windows mode, that
option is unavailable.
Create the following keys if necessary. Most probably the keys will be found in those locations.
For Internet Explorer's Favorites folder:
[HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main]
change: "FavIntelliMenus"="yes"
to
"FavIntelliMenus"="no"
For the Start Menu, and sub-menus:
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced]
change:
"IntelliMenus"=dword:00000001
to "IntelliMenus"=dword:00000000

What is a preprocessor and what will it do for a program?

The preprocessor is used to modify your program according to the preprocessor directives in your source code. Preprocessor directives (such as #define) give the preprocessor specific instructions on how to modify your source code. The preprocessor reads in all of your include files and the source code you are compiling and creates a preprocessed version of your source code. This preprocessed version has all of its macros and constant symbols replaced by their corresponding code and value assignments. If your source code contains any conditional preprocessor directives (such as #if), the preprocessor evaluates the condition and modifies your source code accordingly.

The C preprocessor is used to modify your program according to the preprocessor directives in your source code. A preprocessor directive is a statement (such as #define) that gives the preprocessor specific instructions on how to modify your source code. The preprocessor is invoked as the first part of your compiler program.s compilation step. It is usually hidden from the programmer because it is run automatically by the compiler.