I know it's probably not the best way to do that - and if anyone knows a
better way let me know - but here's what I did:

Run : Regedit

Go To :
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Curr entVersion\explorer\FolderTypes\

Delete the content of the following keys (I left the subdirs intact).
You will need to change the access rights to these folders first.
(Permissions/ Take Ownership / Change your rights to "full access")

{af9c03d6-7db9-4a15-9464-13bf9fb69a2a}
{7d49d726-3c21-4f05-99aa-fdc2c9474656}
{0b7467fb-84ba-4aae-a09b-15b71097af9e}
{b3690e58-e961-423b-b687-386ebfd83239}

That should deactivate the folder types "Music, Pictures, Documents and
Music and Music Icons". I strongly recommend you make a backup of those keys
first before you change anything.