diff --git a/.bin/Scripts/functions/windows_setup.py b/.bin/Scripts/functions/windows_setup.py
index be016a2d..78396a0e 100644
--- a/.bin/Scripts/functions/windows_setup.py
+++ b/.bin/Scripts/functions/windows_setup.py
@@ -202,7 +202,8 @@ def setup_windows_re(windows_version, windows_letter='W', tools_letter='T'):
 
 def update_boot_partition(system_letter='S', windows_letter='W', mode='ALL'):
     cmd = [
-        r'{}:\Windows\System32\bcdboot.exe'.format(windows_letter),
+        r'{}:\Windows\System32\bcdboot.exe'.format(
+            global_vars['Env']['SYSTEMDRIVE']),
         r'{}:\Windows'.format(windows_letter),
         '/s', '{}:'.format(system_letter),
         '/f', mode]