KB953631 (Update to resolve an issue in which the system may be in an inconsistent state after you have restarted with the Last Known Good option):
Vista x86 - http://www.microsoft.com/downloads/details.aspx?familyid=c783e6c7-7be7-4521-a4c1-d3c416988f87&displaylang=en&tm
Vista x64 - http://www.microsoft.com/downloads/details.aspx?familyid=68f8a960-64fa-4a45-89bc-e4fcd78b779f&displaylang=en&tm
KB951072 (Update to resolve an issue that is caused by revised daylight saving time laws in many countries):
Vista x86 - http://www.microsoft.com/downloads/details.aspx?familyid=0f3d73d2-a9b2-4a7f-a817-9686983976fd&displaylang=en&tm
Vista x64 - http://www.microsoft.com/downloads/details.aspx?familyid=25bbf02c-0784-437c-85b3-1c489d707e11&displaylang=en&tm
XP x86 - http://www.microsoft.com/downloads/details.aspx?familyid=81d03da3-846c-4f7f-8791-cd9943ce0893&displaylang=en&tm
XP x64 - http://www.microsoft.com/downloads/details.aspx?familyid=d3e0b8a7-d817-487f-840e-7f7af7bec699&displaylang=en&tm
Thanks for the call out to the DST and time zone update. An addition: this update also includes a few new time zones added to Windows as noted in http://support.microsoft.com/kb/951072/ (and all changes noted in http://support.microsoft.com/kb/914387)