diff --git a/core/metadata/art_apply.py b/core/metadata/art_apply.py
index fe79d266..faac0b7d 100644
--- a/core/metadata/art_apply.py
+++ b/core/metadata/art_apply.py
@@ -126,10 +126,13 @@ def apply_art_to_album_files(
     # Pre-flight: if the mount is read-only, every save below would fail with
     # EROFS one by one (Tim's report: a wall of per-file warnings and a 777
     # chmod that couldn't help). statvfs asks the kernel without writing.
+    # POSIX-only — Windows has no os.statvfs (and no ':ro' bind mounts);
+    # there we skip straight to the per-file path, same as before this fix.
     probe_dir = folder or (os.path.dirname(paths[0]) if paths else None)
-    if probe_dir:
+    _statvfs = getattr(os, "statvfs", None)
+    if probe_dir and _statvfs is not None:
         try:
-            if os.statvfs(probe_dir).f_flag & os.ST_RDONLY:
+            if _statvfs(probe_dir).f_flag & getattr(os, "ST_RDONLY", 1):
                 logger.warning(
                     "Art apply skipped: %s is on a READ-ONLY filesystem "
                     "(docker ':ro' volume mount — chmod cannot fix this)",
diff --git a/tests/test_art_apply.py b/tests/test_art_apply.py
index a7661ef3..4169eab9 100644
--- a/tests/test_art_apply.py
+++ b/tests/test_art_apply.py
@@ -203,3 +203,22 @@ def test_apply_normal_failure_not_flagged_read_only(tmp_path, monkeypatch):
 
     assert res['read_only_fs'] is False      # EACCES is chmod-able, EROFS is not
     assert res['failed'] == 1
+
+
+def test_apply_works_without_statvfs_windows(tmp_path, monkeypatch):
+    """Windows has no os.statvfs — the pre-flight must vanish gracefully,
+    not crash the apply (Boulder runs on Windows)."""
+    f = tmp_path / 'a.mp3'
+    f.write_bytes(b'')
+    saved = []
+    audio = SimpleNamespace(pictures=[], tags=None, add_tags=lambda: None,
+                            save=lambda: saved.append(True))
+    monkeypatch.setattr(aa, 'get_mutagen_symbols', lambda: _fake_symbols(audio))
+    monkeypatch.setattr(aa, 'embed_album_art_metadata', lambda *a, **k: True)
+    monkeypatch.setattr(aa, 'download_cover_art', lambda *a, **k: None)
+    monkeypatch.delattr(aa.os, 'statvfs', raising=False)
+
+    res = aa.apply_art_to_album_files([str(f)], {}, {}, folder=str(tmp_path))
+
+    assert res['embedded'] == 1 and saved == [True]
+    assert res['read_only_fs'] is False