diff --git a/TeXmacs/progs/kernel/texmacs/tm-dialogue-test.scm b/TeXmacs/progs/kernel/texmacs/tm-dialogue-test.scm
index 18d88eae73..592c12c834 100644
--- a/TeXmacs/progs/kernel/texmacs/tm-dialogue-test.scm
+++ b/TeXmacs/progs/kernel/texmacs/tm-dialogue-test.scm
@@ -333,6 +333,62 @@
   (recent-files-save)
 ) ;define
 
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; Tests for legacy migration markers (4466)
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+;; Windows 文件名禁止 < > : " | ? *。标记名含 '>' 时 string-save 静默失败、
+;; url-exists? 永远为 #f，每次启动都重新导入 interactive.scm 的旧 recent-buffer，
+;; 表现为「清空最近文件 → 重启 → 全部回来」。
+
+(define (windows-illegal-file-name? name)
+  (not (not (or (string-index name #\<)
+              (string-index name #\>)
+              (string-index name #\:)
+              (string-index name #\")
+              (string-index name #\|)
+              (string-index name #\?)
+              (string-index name #\*)
+            ) ;or
+       ) ;not
+  ) ;not
+) ;define
+
+(define (test-migration-marker-names-portable)
+  (for-each
+    (lambda (marker)
+      (let ((tail (url->system (url-tail (string->url marker)))))
+        (check (list tail (windows-illegal-file-name? tail)) => (list tail #f))
+      ) ;let
+    ) ;lambda
+    (list interactive-arg-migration-marker-v1 recent-files-migration-marker-v1)
+  ) ;for-each
+) ;define
+
+(define (test-migration-marker-round-trip)
+  ;; 用真实标记文件名的尾部在临时目录落盘：写得出、查得到。旧名在 Windows 上此处必红。
+  (let* ((tail (url->system (url-tail (string->url recent-files-migration-marker-v1))))
+         (tmp (string-append "/tmp/4466_" tail))
+        ) ;
+    (write-migration-marker tmp)
+    (check (url-exists? tmp) => #t)
+    (system-remove (string->url tmp))
+  ) ;let*
+) ;define
+
+(define (test-migration-marker-legacy-recognized)
+  ;; 新旧标记任一存在即视为已迁移，避免 macOS/Linux 已迁移用户再导入一次。
+  (let ((new-m "/tmp/4466_marker_new") (old-m "/tmp/4466_marker_old"))
+    (check (migration-marker-exists? new-m old-m) => #f)
+    (write-migration-marker old-m)
+    (check (migration-marker-exists? new-m old-m) => #t)
+    (system-remove (string->url old-m))
+    (write-migration-marker new-m)
+    (check (migration-marker-exists? new-m old-m) => #t)
+    (system-remove (string->url new-m))
+  ) ;let
+) ;define
+
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;; Test entry point
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
@@ -346,5 +402,8 @@
   (test-validation)
   (test-recent-files-lru-limit)
   (test-persistence)
+  (test-migration-marker-names-portable)
+  (test-migration-marker-round-trip)
+  (test-migration-marker-legacy-recognized)
   (check-report)
 ) ;tm-define
diff --git a/TeXmacs/progs/kernel/texmacs/tm-dialogue.scm b/TeXmacs/progs/kernel/texmacs/tm-dialogue.scm
index 0f78a2dcbc..fb9c724c2d 100644
--- a/TeXmacs/progs/kernel/texmacs/tm-dialogue.scm
+++ b/TeXmacs/progs/kernel/texmacs/tm-dialogue.scm
@@ -189,13 +189,32 @@
 
 (define legacy-interactive-arg-file "$TEXMACS_HOME_PATH/system/interactive.scm")
 
-(define interactive-arg-migration-marker-v1
+;; 旧数据迁移标记文件。文件名不能含 '>'：Windows 文件名禁止 < > : " | ? *，
+;; 原名 xxx.scm->v1 在 Windows 上永远写不出来，于是每次启动都判定「未迁移」，
+;; 把 interactive.scm 里的旧 recent-buffer 条目重新导入——用户清空最近文件后
+;; 重启又全部回来（#4466）。macOS/Linux 上旧标记已落盘，继续识别以免重复导入。
+
+(define-public interactive-arg-migration-marker-v1
+  "$TEXMACS_HOME_PATH/system/interactive.scm.migrated-v1"
+) ;define-public
+
+(define-public legacy-interactive-arg-migration-marker-v1
   "$TEXMACS_HOME_PATH/system/interactive.scm->v1"
-) ;define
+) ;define-public
+
+(define-public recent-files-migration-marker-v1
+  "$TEXMACS_HOME_PATH/system/recent-files.scm.migrated-v1"
+) ;define-public
 
-(define recent-files-migration-marker-v1
+(define-public legacy-recent-files-migration-marker-v1
   "$TEXMACS_HOME_PATH/system/recent-files.scm->v1"
-) ;define
+) ;define-public
+
+;; 迁移是否已完成：新标记或旧标记任一存在即视为完成。
+
+(define-public (migration-marker-exists? marker legacy-marker)
+  (or (url-exists? marker) (url-exists? legacy-marker))
+) ;define-public
 
 (define-public (make-empty-state kind)
   (case kind
@@ -850,9 +869,9 @@
   ) ;if
 ) ;define-public
 
-(define (write-migration-marker marker-file)
+(define-public (write-migration-marker marker-file)
   (string-save "migrated\n" (string->url marker-file))
-) ;define
+) ;define-public
 
 (define (legacy-scm-interactive-assoc-valid? assoc-t)
   (and (list? assoc-t) (list-and (map pair? assoc-t)))
@@ -1072,8 +1091,18 @@
 ) ;define
 
 (define (maybe-import-legacy-scm-interactive-state)
-  (let ((need-interactive? (not (url-exists? interactive-arg-migration-marker-v1)))
-        (need-recent? (not (url-exists? recent-files-migration-marker-v1)))
+  (let ((need-interactive?
+          (not (migration-marker-exists? interactive-arg-migration-marker-v1
+                 legacy-interactive-arg-migration-marker-v1
+               ) ;migration-marker-exists?
+          ) ;not
+        ) ;need-interactive?
+        (need-recent?
+          (not (migration-marker-exists? recent-files-migration-marker-v1
+                 legacy-recent-files-migration-marker-v1
+               ) ;migration-marker-exists?
+          ) ;not
+        ) ;need-recent?
        ) ;
     (when (and (or need-interactive? need-recent?)
             (url-exists? legacy-interactive-arg-file)
diff --git a/TeXmacs/progs/source/shortcut-edit.scm b/TeXmacs/progs/source/shortcut-edit.scm
index 1a78a342c8..5eeb1734a5 100644
--- a/TeXmacs/progs/source/shortcut-edit.scm
+++ b/TeXmacs/progs/source/shortcut-edit.scm
@@ -22,7 +22,15 @@
 
 (define legacy-user-shortcuts-file "$TEXMACS_HOME_PATH/system/shortcuts.scm")
 
+;; 迁移标记文件名不能含 '>'（Windows 文件名禁止），否则标记永远写不出来，
+;; 每次启动都重复导入 shortcuts.scm（同 #4466 的 recent-files 问题）。
+;; 旧标记在 macOS/Linux 上已落盘，继续识别。
+
 (define user-shortcuts-migration-marker-v1
+  "$TEXMACS_HOME_PATH/system/shortcuts.scm.migrated-v1"
+) ;define
+
+(define legacy-user-shortcuts-migration-marker-v1
   "$TEXMACS_HOME_PATH/system/shortcuts.scm->v1"
 ) ;define
 
@@ -188,6 +196,7 @@
 (define (maybe-import-legacy-scm-user-shortcuts)
   (when (and (url-exists? legacy-user-shortcuts-file)
           (not (url-exists? user-shortcuts-migration-marker-v1))
+          (not (url-exists? legacy-user-shortcuts-migration-marker-v1))
         ) ;and
     (and-with legacy-shortcuts
       (load-legacy-scm-user-shortcuts)