diff --git a/windows_hardening.md b/windows_hardening.md
index 715621e..e91d955 100644
--- a/windows_hardening.md
+++ b/windows_hardening.md
@@ -26,6 +26,8 @@ ref: https://github.com/libyal/libbde/blob/main/documentation/BitLocker%20Drive%
 6. `manage-bde -protectors -add c: -TPM`` to 'remove' the PIN
 7. `manage-bde -w Drive:` um den freien Speicherplatz zu löschen
 
+### hyper-v 
+to boot a archlinux image you need to deactivate in the kernel line the `ibt=off` Kernel Bug 216332
 
 ### driver blocklist
 #### ref