diff --git a/src/boot.sh b/src/boot.sh
index f9e62b3..308b0ca 100644
--- a/src/boot.sh
+++ b/src/boot.sh
@@ -20,6 +20,10 @@ case "${BOOT_MODE,,}" in
     ROM="AAVMF_CODE.ms.fd"
     VARS="AAVMF_VARS.ms.fd"
     ;;
+  windows_secure)
+    ROM="AAVMF_CODE.ms.fd"
+    VARS="AAVMF_VARS.ms.fd"
+    ;;
   *)
     info "Unknown boot mode '${BOOT_MODE}', defaulting to 'uefi'"
     BOOT_MODE="uefi"
@@ -38,15 +42,15 @@ fi
 AAVMF="/usr/share/AAVMF/"
 DEST="$STORAGE/${BOOT_MODE,,}"
 
-if [ ! -s "$DEST.rom" ]; then
-  [ ! -s "$AAVMF/$ROM" ] && error "UEFI boot file ($AAVMF/$ROM) not found!" && exit 44
+if [ ! -s "$DEST.rom" ] || [ ! -f "$DEST.rom" ]; then
+  [ ! -s "$AAVMF/$ROM" ] || [ ! -f "$AAVMF/$ROM" ] && error "UEFI boot file ($AAVMF/$ROM) not found!" && exit 44
   rm -f "$DEST.rom"
   dd if=/dev/zero "of=$DEST.rom" bs=1M count=64 status=none
   dd "if=$AAVMF/$ROM" "of=$DEST.rom" conv=notrunc status=none
 fi
 
-if [ ! -s "$DEST.vars" ]; then
-  [ ! -s "$AAVMF/$VARS" ] && error "UEFI vars file ($AAVMF/$VARS) not found!" && exit 45
+if [ ! -s "$DEST.vars" ] || [ ! -f "$DEST.vars" ]; then
+  [ ! -s "$AAVMF/$VARS" ] || [ ! -f "$AAVMF/$VARS" ] && error "UEFI vars file ($AAVMF/$VARS) not found!" && exit 45
   rm -f "$DEST.vars"
   dd if=/dev/zero "of=$DEST.vars" bs=1M count=64 status=none
   dd "if=$AAVMF/$VARS" "of=$DEST.vars" conv=notrunc status=none