KB2518870 and KB2539636 always fail with the message Code 643 and has Code 66

Security for Microsoft .NET Framework 4 updates on... Windows Vista... KB2518870 and KB2539636 always fail with the message Code 643 and Code 66 has.  I can't find these codes or the reasons for these failures.  This happened for well over a month now.  They are reported as of the important updates, but won't install but no problem with the other updates.  Should I be worried?  Is there a solution to this problem?

Thank you, but it doesn't work anymore. CD don't has not given me the possibility to upgrade the existing installation, so I had to reinstall the system...
Kind regards
Ricardo

Tags: Windows

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