Don’t you just hate it when this happens:
Fortunately, if you’re running inside VirtualBox, you can resize your virtual disk and magically make your guest have a bigger disk very easily. There are 2 steps to doing this:
Bizarrement la commande VBoxManage.exe doit être exécutée sans les privilèges administrateur, sous peine d’une erreur:
Code CO_E_SERVER_EXEC_FAILURE (0x80080005).
Cf: http://cjhaas.com/blog/2012/11/27/error-when-resizing-virtualbox-disk-on-windows/
via Growing your VirtualBox Virtual Disk (The Fat Bloke Sings).