diff --git a/FAQ.md b/FAQ.md
index 4f093a5..c9af414 100644
--- a/FAQ.md
+++ b/FAQ.md
@@ -1092,3 +1092,6 @@ Build a custom client with [WebSocket allowed](https://rustdesk.com/docs/en/self
 - Migrate license to backup server 
 - Change your dns (or reverse proxy, cloudflare etc, you can run the server totaly behind a reverse proxy via [Nginx stream](https://docs.nginx.com/nginx/admin-guide/load-balancer/tcp-udp-load-balancer/) or [WebSocket](https://github.com/rustdesk/rustdesk/wiki/FAQ#websocket)) to backup server
 
+# Failed to start `--server` process in `--service` process.
+
+Some users run Windows sandbox which prevents obtaining user token from winlogon.exe, so that we can not start `--server` process in console user env.
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