Microsoft has released an updated certificate revocation list for Windows

Install this update to resolve an issue which requires an update to the certificate revocation list on Windows systems and to keep your systems certificate list up to date.

Update for Windows 7 (KB2641690)
Update for Windows Server 2008 R2 for Itanium-based Systems (KB2641690)
Update for Windows Server 2003 (KB2641690)
Update for Windows Vista (KB2641690)
Update for Windows Server 2008 (KB2641690)
Update for Windows XP x64 Edition (KB2641690)
Update for Windows Server 2008 x64 Edition (KB2641690)
Update for Windows Server 2008 for Itanium-based Systems (KB2641690)
Update for Windows Vista for x64-based Systems (KB2641690)
Update for Windows Server 2003 for Itanium-based Systems (KB2641690)
Update for Windows XP (KB2641690)
Update for Windows 7 for x64-based Systems (KB2641690)
Update for Windows 7 (KB2641690)