Cancellare dal GRUB Windows Recovery

Per nascondere la partizione di recovery di Windows è necessario (e spero sufficiente) seguire il punto 6 di questa guida sul forum internazionale, che riporto qui per completezza e comodità

HIDING THE WINDOWS RECOVERY PARTITION (Vista)

GRUB 2 will find and create a menuentry for the Windows (Vista) Recovery partition. At least in Vista, the menu name is the same as the normal Vista operating partition, the only difference being the parttion designation. To remove the Recovery partition entry from the menu:

• Backup the existing /etc/grub.d/30_os-prober file, remove the executable bit from the backup so it isn't run during updates, and open the original for editing (the section starts around line 134):

  sudo cp /etc/grub.d/30_os-prober /etc/grub.d/30_os-prober.original  && sudo chmod -x /etc/grub.d/30_os-prober.original  
  gksu gedit +83 /etc/grub.d/30_os-prober &
  

• Determine the exact title and the Windows recovery partition. These can be located in the /boot/grub/grub.cfg file. Add the highlighted entry below. In the example, the menuentry appeared as "Windows Vista (loader) (on /dev/sda1)". Make sure you select the correct partition as the title may be the same for the normal and recovery titles. The area in bright red should be the exact contents between the quotes in the menuentry for the recovery partition:

  for OS in ${OSPROBED} ; do
  DEVICE="`echo ${OS} | cut -d ':' -f 1`"
  LONGNAME="`echo ${OS} | cut -d ':' -f 2 | tr '^' ' '`"
  LABEL="`echo ${OS} | cut -d ':' -f 3 | tr '^' ' '`"
  BOOT="`echo ${OS} | cut -d ':' -f 4`"
  
  if [ -z "${LONGNAME}" ] ; then
  LONGNAME="${LABEL}"
  fi
  
  # Added to remove Windows Recovery
  if [ "$LONGNAME" = "Windows Vista (loader)" ] && [ "${DEVICE}" = "/dev/sda1" ] ; then
  continue
  fi
  # End Added
  

• Save the file, then run:

  sudo update-grub