diff --git a/build_pkg b/build_pkg
index 5be8cb5b..4b8fd1ab 100644
--- a/build_pkg
+++ b/build_pkg
@@ -157,7 +157,7 @@ class pkg():
             else:
                 # subprocess.call('python ' + pyinstaller_path + ' --upx-dir C:\\upx multibootusb.spec', shell=True) == 0 and \
                 #        os.path.exists(os.path.join("dist", 'multibootusb-' + self.version + ".exe")):
-                if subprocess.call('python ' + pyinstaller_path + ' --onefile onefile-multibootusb.spec', shell=True) == 0 and \
+                if subprocess.call('python ' + pyinstaller_path + ' --uac-admin --onefile onefile-multibootusb.spec', shell=True) == 0 and \
                         os.path.exists(os.path.join("dist", 'multibootusb-' + self.version + ".exe")):
                     shutil.copy2(os.path.join("dist", 'multibootusb-' + self.version + ".exe"),
                                               os.path.join(self.release_upload_dir, "Windows"))
diff --git a/data/version.txt b/data/version.txt
index e5c15102..f7ee0669 100644
--- a/data/version.txt
+++ b/data/version.txt
@@ -1 +1 @@
-8.9.0
+9.0.0
diff --git a/scripts/update_cfg_file.py b/scripts/update_cfg_file.py
index a4bff75d..43ffba5a 100644
--- a/scripts/update_cfg_file.py
+++ b/scripts/update_cfg_file.py
@@ -409,6 +409,9 @@ def update_mbusb_cfg_file(iso_link, usb_uuid, usb_mount, distro):
 
             config_file.write("#end " + iso_basename(iso_link) + "\n")
             config_file.close()
+            # Update extlinux.cfg file by copying updated syslinux.cfg
+            shutil.copy(os.path.join(usb_mount, 'multibootusb', 'syslinux.cfg'),
+                        os.path.join(usb_mount, 'multibootusb', 'extlinux.cfg'))
 
 
 def kaspersky_config(distro):
diff --git a/scripts/usb.py b/scripts/usb.py
index dd972f3c..8f216449 100644
--- a/scripts/usb.py
+++ b/scripts/usb.py
@@ -361,9 +361,12 @@ def gpt_device(dev_name):
     :return: True if GPT else False
     """
     if platform.system() == 'Windows':
+        startupinfo = subprocess.STARTUPINFO()
+        startupinfo.dwFlags |= subprocess.STARTF_USESHOWWINDOW
         diskpart_cmd = 'wmic partition get name, type'
         dev_no = get_physical_disk_number(dev_name)
-        cmd_out = subprocess.check_output(diskpart_cmd)
+        cmd_out = subprocess.check_output(diskpart_cmd, subprocess.SW_HIDE, startupinfo=startupinfo)
+        gen.log(cmd_out)
         cmd_spt = cmd_out.split(b'\r')
         for line in cmd_spt:
             line = line.decode('utf-8')