diff --git a/client/lib/engine/bin/UEFILib.py b/client/lib/engine/bin/UEFILib.py
index 4c54401..a70b5a7 100644
--- a/client/lib/engine/bin/UEFILib.py
+++ b/client/lib/engine/bin/UEFILib.py
@@ -117,6 +117,39 @@ def ogNvramAddEntry (bootlbl, bootldr, nvram_set=False):
 #@exception OG_ERR_NOTFOUND  fichero o dispositivo no encontrado.
 #@note    Si existe el cargador en la partición de sistema no es válido
 #*/ ##
+def ogCopyEfiBootLoader (disk, par):
+    mntdir = FileSystemLib.ogMount (disk, par)
+    if not mntdir:
+        SystemLib.ogRaiseError ([], ogGlobals.OG_ERR_PARTITION, f'{disk} {par}')
+        return None
+
+    esp = DiskLib.ogGetEsp()
+    if not esp:
+        SystemLib.ogRaiseError ([], ogGlobals.OG_ERR_NOTFOUND, 'EFI partition')
+        return
+    esp_disk, esp_par = esp.split()
+    efidir = FileSystemLib.ogMount (esp_disk, esp_par)
+    if not efidir:
+        SystemLib.ogRaiseError ([], ogGlobals.OG_ERR_PARTITION, 'ESP')
+        return
+
+    bootlabel = f'Part-{int(disk):02d}-{int(par):02d}'
+    osversion = InventoryLib.ogGetOsVersion (disk, par)
+    print (f'bootlabel ({bootlabel})')
+    print (f'osversion ({osversion})')
+    if 'Windows 1' in osversion:
+        loader = None
+        for i in f'{efidir}/EFI/Microsoft/Boot/bootmgfw.efi', f'{efidir}/EFI/{bootlabel}/Boot/bootmgfw.efi':
+            if os.path.exists (i):
+                loader = i
+        if not loader:
+            SystemLib.ogRaiseError ([], ogGlobals.OG_ERR_NOTOS, f'{disk} {par} ({osversion}, EFI)')
+            return None
+
+        if (os.path.isdir (f'{mntdir}/ogBoot')):
+            shutil.rmtree (f'{mntdir}/ogBoot')
+        dirloader = os.path.realpath (os.path.dirname (loader) + '/..')
+        shutil.copytree (f'{dirloader}/Boot', f'{mntdir}/ogBoot')
 
 
 #/**
diff --git a/client/shared/functions/ogCopyEfiBootLoader b/client/shared/functions/ogCopyEfiBootLoader
new file mode 100755
index 0000000..41d5d9b
--- /dev/null
+++ b/client/shared/functions/ogCopyEfiBootLoader
@@ -0,0 +1,23 @@
+#!/usr/bin/python3
+
+import sys
+import argparse
+from SystemLib import ogHelp
+from UEFILib import ogCopyEfiBootLoader
+
+parser = argparse.ArgumentParser (add_help=False)
+parser.add_argument ('disk')
+parser.add_argument ('par')
+
+if 2 == len (sys.argv) and 'help' == sys.argv[1]:
+    #parser.print_help() sale en inglés aunque la locale indique otra cosa
+    ogHelp ('ogCopyEfiBootLoader', 'ogCopyEfiBootLoader int_ndisk int_part', ['ogCopyEfiBootLoader 1 2'])
+    sys.exit (0)
+
+args = parser.parse_args()
+ret = ogCopyEfiBootLoader (args.disk, args.par)
+
+if ret is not None:
+    if   ret == True: sys.exit (0)
+    elif ret == False: sys.exit (1)
+    else: print (ret)