annotate windows folders

Solution 1:

It sounds like you're looking for what is called an "InfoTip". An example of this is shown below:

Example of an InfoTip

You can add an InfoTip to a folder by adding an InfoTip entry to the .ShellClassInfo section of the desktop.ini contained in the folder.

An example of the contents of such a file:

[.ShellClassInfo]
InfoTip=Some sensible information.

Note, the folder needs to be marked as a system folder for the text to be shown. This can be accomplished by running the following command:

attrib +s <folder_name>

For further information, and more help in doing it, see the following: