Microsoft notes an active attack for at least one DigiNotar certificate. 

MS Security Advisory Update – Fraudulent DigiNotar Certificates

QUOTE: Microsoft re-released Microsoft Security Advisory (2607712) regarding fraudulent DigiNotar Root CA. “Microsoft is aware of active attacks using at least one fraudulent digital certificate issued by DigiNotar, a certification authority present in the Trusted Root Certification Authorities Store. The update is available for all supported version of Windows here and via automatic updates.