These are most likely leftovers depuis le installation processus and it is safe to supprimer them.
Cependant, just in case, I would first créez un temporary répertoire sur le same disk and move them into it. If no bad effects happen for several days, ensuite they can be safely supprimé.
Si vous get the "Access is Denied" erreur message even si vous are the administrator, vous allez need to take control duse dossiers. For that, see the following article:
How to take ownership of a file or a folder in Windows XP
