Error code 646 when installing the automatic/important updates for Windows Vista (with Service Pack 2)

Recently, I received 646 error code when you try to install the important/automatic updates to Windows Vista. What patches are there for this issue? What risks are there to do not overcome this problem?

rivercitylady,
Usually with the code 646 error, if you download the update and install it manually that will fix the problem.
Go to the Microsoft Download Center and search for the number of the update has failed.  Download on your PC, then run it from there. Mike - Engineer Support Microsoft Answers
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Tags: Windows

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