Index: b/os-probes/mounted/x86/20microsoft
===================================================================
--- a/os-probes/mounted/x86/20microsoft
+++ b/os-probes/mounted/x86/20microsoft
@@ -7,6 +7,12 @@ partition="$1"
 mpoint="$2"
 type="$3"
 
+# This script looks for legacy BIOS bootloaders only. Skip if running UEFI
+if [ -d /sys/firmware/efi ]; then
+	debug "Skipping legacy bootloaders on UEFI system"
+	exit 1
+fi
+
 # Weed out stuff that doesn't apply to us
 case "$type" in
 	ntfs|ntfs-3g) debug "$1 is a NTFS partition" ;;