diff --git a/boredos.iso b/boredos.iso
index ff76a2e..6dda069 100644
Binary files a/boredos.iso and b/boredos.iso differ
diff --git a/src/kernel/kutils.c b/src/kernel/kutils.c
index 473769e..3878258 100644
--- a/src/kernel/kutils.c
+++ b/src/kernel/kutils.c
@@ -108,7 +108,9 @@ void k_reboot(void) {
 }
 
 void k_shutdown(void) {
-    outw(0x604, 0x2000);
+    outw(0xB004, 0x2000); // QEMU older / some pc machines
+    outw(0x604, 0x2000);  // QEMU newer (i440fx/q35)
+    outw(0x4004, 0x3400); // VirtualBox fallback
 }
 
 void k_beep(int freq, int ms) {