diff --git a/make_win_usb b/make_win_usb
index c1b9c06..6929fac 100755
--- a/make_win_usb
+++ b/make_win_usb
@@ -2,25 +2,33 @@
 
 # Source: http://admincloud.net/116/creer-une-cle-usb-bootable-de-windows-sous-linux/
 
-WIN_HDD="${1}"
+WIN_USB="${1}"
 WIN_USB_MNT_PATH=/mnt/USBW7/
 WIN_ISO_FILE="${2}"
 WIN_ISO_MNT_PATH=/mnt/WIN7/
 
+# Test if args exists
+for file in "${WIN_USB}" "${WIN_ISO_FILE}"; do
+  if [ ! -e "${file}" ]; then
+    printf '%b' "${file} doesn't exists. Please check your args.\n"
+    exit 1
+  fi
+done
+
 # Empty MBR
-sudo dd if=/dev/zero of=${WIN_HDD} bs=446 count=1
+sudo dd if=/dev/zero of=${WIN_USB} bs=446 count=1
 
 # Ensure to have a MS-DOS partition table
-sudo parted ${WIN_HDD} mklabel msdos
+sudo parted ${WIN_USB} mklabel msdos
 
 # Create one big partition with "boot" flag then format in NFTS
-sudo parted ${WIN_HDD} mkpart primary 0% 100MS-partition table
-sudo parted ${WIN_HDD} set 1 boot on
-sudo mkfs.ntfs ${WIN_HDD}1 --fast --no-indexing
+sudo parted ${WIN_USB} mkpart primary 0% 100MS-partition table
+sudo parted ${WIN_USB} set 1 boot on
+sudo mkfs.ntfs ${WIN_USB}1 --fast --no-indexing
 
 # Mount USB key
 sudo mkdir -p -- "${WIN_USB_MNT_PATH}"
-sudo mount ${WIN_HDD}1 "${WIN_USB_MNT_PATH}"
+sudo mount ${WIN_USB}1 "${WIN_USB_MNT_PATH}"
 
 # Mount ISO file
 sudo mkdir -p -- "${WIN_ISO_MNT_PATH}"
@@ -54,6 +62,6 @@ if [ ! $(command -v ms-sys) ]; then
 fi
 
 # For Win 7/8
-sudo ms-sys --mbr7 "${WIN_HDD}"
+sudo ms-sys --mbr7 "${WIN_USB}"
 
 exit 0