diff --git a/FAQ.md b/FAQ.md
index 5cfbd52..1259092 100644
--- a/FAQ.md
+++ b/FAQ.md
@@ -1630,6 +1630,10 @@ Below id format is required.
 C:\Windows\ServiceProfiles\LocalService\AppData\Roaming\RustDesk
 ```
 
+- Change machine id
+
+For windows you should use [sysprep](https://www.google.com/search?q=sysprep+change+machine+id&oq=sysprep+change+machine+id&gs_lcrp=EgZjaHJvbWUyBggAEEUYOTIHCAEQABiABDIGCAIQABgeMgYIAxAAGB4yBggEEAAYHjIGCAUQABgeMgYIBhAAGB4yBggHEAAYHjIGCAgQABgeMgYICRAAGB7SAQg4MjQ1ajBqN6gCALACAA&sourceid=chrome&ie=UTF-8) to reset SID 
+
 and reboot the system.
 
 # Authenticate SMTP to Office 365