This plugin allows you to save any file as administrator.
Just press "Save" in Notepad++ and if you are not allowed to change this file as user, Notepad++ will save it as administrator.
Windows XP, Windows Vista, Windows 7, Windows 8 are supported.
Unpack to "%NOTEPAD-FOLDER-DIR%/plugins" to install
Works as described. You will be prompted by the UAC to approve the save, but it's still better than starting Notepad++ in Administrator mode each time I need to modify a file with admin rights.