Még egy érdekes tipp, ő is hasonló cipőben
járt:<http://answers.microsoft.com/en-us/windows/forum/windows_vista-windows_update/windows-update-error-80072efd/398546d2-6b6d-47a0-b075-82d815fa9a8f>
The following solution worked for me on a PC running Vista SP1. *This was
after all of the other suggestions provided by Microsoft Support* at
http://support.microsoft.com/kb/836941 and
http://support.microsoft.com/kb/971058 did not work.

Solution (Vista SP 1):

1. Click the "Start" Button, click "All programs", and click "Accessories".
2. Right-click "Command Prompt" Run as administrator". If you are prompted
for an administrator password or confirmation, type the password or provide
confirmation. 3. Type "netsh winhttp reset proxy" (without quotes) at the
command prompt, and press Enter. 4. Try the update again.
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válasz