1. Configure
Windows Update Settings and reboot.
2. If the problem persists, open
regedit > navigate to
HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\windows\Windows Update > if exists, the DWORD NoAutoUpdate value should be set 0.
3. Also, please see
Link Removed again, clear the browser's cache and history and clear the contents of the WindowsUpdate folder:
If you're using a firewall, you may want to temporarily disable it. If still no luck, what does your event viewer report?