diff --git a/src/antigravity_provider/agy_subprocess.py b/src/antigravity_provider/agy_subprocess.py
index 4fd1231..da1d12e 100644
--- a/src/antigravity_provider/agy_subprocess.py
+++ b/src/antigravity_provider/agy_subprocess.py
@@ -162,6 +162,7 @@ def discover_models(profile_id: str | None = None) -> dict[str, str]:
             errors="replace",
             env=env,
             stdin=subprocess.DEVNULL,
+            **hidden_process_kwargs(),
         )
         raw = result.stdout.strip()
         if not raw or result.returncode != 0:
@@ -618,6 +619,26 @@ BLOCKED_SECRET_PATTERNS: tuple[str, ...] = (
 )
 
 
+def hidden_process_kwargs() -> dict:
+    """Флаги запуска подпроцесса без видимого окна консоли (только Windows).
+
+    Хаб — оконное приложение без консоли, поэтому каждый запуск консольного
+    exe (agy.exe и прочие) открывал отдельное чёрное окно. Пока проверка шла
+    по нажатию, это было незаметно. После A50 проверка аккаунтов запускается
+    сама раз в минуту, и окна стали появляться постоянно, мешая работе.
+
+    Применять ко всем ФОНОВЫМ вызовам. Для входа по OAuth окно нужно
+    видимым — там сознательно используется CREATE_NEW_CONSOLE.
+    """
+    if os.name != "nt":
+        return {}
+    flags = getattr(subprocess, "CREATE_NO_WINDOW", 0x08000000)
+    startupinfo = subprocess.STARTUPINFO()
+    startupinfo.dwFlags |= subprocess.STARTF_USESHOWWINDOW
+    startupinfo.wShowWindow = subprocess.SW_HIDE
+    return {"creationflags": flags, "startupinfo": startupinfo}
+
+
 def build_safe_subprocess_env(
     base_env: dict[str, str] | None = None,
     allow_extra_keys: set[str] | list[str] | None = None,
@@ -748,6 +769,7 @@ def agy_generate(
             encoding="utf-8",
             errors="replace",
             env=custom_env if custom_env is not None else build_safe_subprocess_env(),
+            **hidden_process_kwargs(),
         )
     except subprocess.TimeoutExpired:
         return _error_completion(model_raw, "agy subprocess timed out")
diff --git a/src/antigravity_provider/credentials.py b/src/antigravity_provider/credentials.py
index 274cc8e..c565249 100644
--- a/src/antigravity_provider/credentials.py
+++ b/src/antigravity_provider/credentials.py
@@ -9,6 +9,7 @@ import tempfile
 from datetime import datetime
 from pathlib import Path
 from typing import Any, Callable
+from antigravity_provider.agy_subprocess import hidden_process_kwargs
 
 
 def _hermes_home() -> Path:
@@ -94,6 +95,7 @@ def load_agy_keychain_credentials(*, runner: Callable[[], str] | None = None) ->
             ["security", "find-generic-password", "-a", "antigravity", "-s", "gemini", "-w"],
             stderr=subprocess.DEVNULL,
             timeout=5,
+            **hidden_process_kwargs(),
         ).decode("utf-8")
 
     try:
diff --git a/src/antigravity_provider/router/codex_oauth.py b/src/antigravity_provider/router/codex_oauth.py
index 171006f..a7dc6bb 100644
--- a/src/antigravity_provider/router/codex_oauth.py
+++ b/src/antigravity_provider/router/codex_oauth.py
@@ -25,6 +25,7 @@ from pathlib import Path
 from typing import Any, Dict, Optional, Tuple
 
 from antigravity_provider.router.profile_manager import ProfileAuthManager, mask_email
+from antigravity_provider.agy_subprocess import hidden_process_kwargs
 
 logger = logging.getLogger("hermes.router.codex_oauth")
 
@@ -380,6 +381,7 @@ def stop_running_codex_processes() -> list[int]:
                 out = subprocess.check_output(
                     ["tasklist", "/FI", f"IMAGENAME eq {proc_name}", "/FO", "CSV", "/NH"],
                     stderr=subprocess.DEVNULL,
+                    **hidden_process_kwargs(),
                     text=True,
                 )
                 for line in out.strip().splitlines():
@@ -389,7 +391,7 @@ def stop_running_codex_processes() -> list[int]:
                             pid_str = parts[1].strip('"')
                             if pid_str.isdigit():
                                 pid = int(pid_str)
-                                subprocess.run(["taskkill", "/F", "/PID", str(pid)], stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
+                                subprocess.run(["taskkill", "/F", "/PID", str(pid)], stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL, **hidden_process_kwargs())
                                 stopped_pids.append(pid)
             except Exception:
                 pass
diff --git a/src/antigravity_provider/router/launcher_bootstrap.py b/src/antigravity_provider/router/launcher_bootstrap.py
index 37619d2..8da2666 100644
--- a/src/antigravity_provider/router/launcher_bootstrap.py
+++ b/src/antigravity_provider/router/launcher_bootstrap.py
@@ -21,6 +21,7 @@ import sys
 import traceback
 from pathlib import Path
 from typing import Dict, List, Tuple
+from antigravity_provider.agy_subprocess import hidden_process_kwargs
 
 
 def get_startup_log_path() -> Path:
@@ -96,6 +97,7 @@ def self_heal_dependencies(missing_packages: List[str]) -> Tuple[bool, str]:
             capture_output=True,
             text=True,
             timeout=90,
+            **hidden_process_kwargs(),
         )
         if res.returncode == 0:
             log_startup("Self-healing successful. Re-verifying package imports...")
diff --git a/src/antigravity_provider/updater/update_manager.py b/src/antigravity_provider/updater/update_manager.py
index 14aeb35..46cc4a8 100644
--- a/src/antigravity_provider/updater/update_manager.py
+++ b/src/antigravity_provider/updater/update_manager.py
@@ -28,6 +28,7 @@ from typing import Any, Callable, Dict, Optional, Tuple
 
 from antigravity_provider import paths
 from antigravity_provider.version import __version__, CHANNEL, MINIMUM_HERMES_VERSION
+from antigravity_provider.agy_subprocess import hidden_process_kwargs
 
 logger = logging.getLogger("hermes.hub.updater")
 
@@ -119,6 +120,7 @@ def get_installed_commit() -> str:
                 capture_output=True,
                 text=True,
                 timeout=5,
+                **hidden_process_kwargs(),
             )
             if res.returncode == 0 and res.stdout.strip():
                 return res.stdout.strip()
@@ -778,6 +780,7 @@ class UpdateManager:
                 capture_output=True,
                 text=True,
                 timeout=15,
+                **hidden_process_kwargs(),
             )
             if res.returncode != 0 or "OK" not in res.stdout:
                 raise RuntimeError(f"Post-update verification failed: {res.stderr or res.stdout}")