How to remove the drive letters?

For windows 7
-Open My Computer. 
-Click on Organize below the address bar and click on "Folder and search options".
                         Or
Press "Alt" key. Menu bar appears. Click on tools on Menu bar Then click on "Folder options"

-In Folder options Click on View.

-Look for "Show Drive letters" in Advanced settings.
-Uncheck the box.
-Click Apply then click Ok.

For windows XP.
-Click on Tools in the menu bar.-Then Click on Folder options.
-Click on View.
-Look for the "Show Drive letters"
-Uncheck the box.
-Click Apply then click Ok