Disable and remove links to Windows Update
User Configuration\AdministrativeTemplates\Start Menu & Taskbar
Prevents users from connecting to the Windows Update Web site.
This policy blocks user access from Windows 2000 to the Windows Update Web site. Also, this policy removes the Windows Update hyperlink from the Start Menu and from the Tools menu in Internet Explorer.
Windows Update, the online extension of Windows, offers software updates to keep a user's system up-to-date. The Windows Update Product Catalog determines any system files, security fixes, and Microsoft updates that users need, and shows the newest versions available for download.