I'm having similar issue with my 64-bit Windows Vista laptop; however, the problem update is for KB2813170 (Windows security update).
Also, now, another update simply fails outright: KB2687309 (security update for Office 2007).
All other updates have installed normally... which seems odd, if there really is an issue.
Same Fix it results though; however, no improvements and KB2813170 keeps getting offered every time Windows Update runs.
Any ideas for this flavor of Windows?
Thank you in advance,
BGreggJ