Nice that it got resolved 🙂 For future reference: http://technet.microsoft.com/en-us/security/advisory/2661254 " Microsoft Security Advisory (2661254) Update For Minimum Certificate Key Length Published: Tuesday, August 14, 2012 | Updated: Tuesday, October 09, 2012 Version: 2.0 General Information Executive Summary Microsoft is announcing the availability of an update to Windows that restricts the use of certificates with RSA keys less than 1024 bits in length. The private keys used in these certificates can be derived and could allow an attacker to duplicate the certificates and use them fraudulently to spoof content, perform phishing attacks, or perform man-in-the-middle attacks. Note This update impacts applications and services that use RSA keys for cryptography and call into the CertGetCertificateChain function. These applications and services will no longer trust certificates with RSA keys less than 1024 bits in length. Examples of impacted applications and services include but are not limited to encrypted email, SSL/TLS encryption channels, signed applications, and private PKI environments. Certificates that use cryptographic algorithms other than RSA are not affected by this update. For more information about applications and services impacted by this update, see Microsoft Knowledge Base Article 2661254. The update is available on the Download Center as well as the Microsoft Update Catalog for all supported releases of Microsoft Windows. In addition, as of October 9, 2012, this update is offered via automatic updating and through the Microsoft Update service. Recommendation. Microsoft recommends that customers apply the update at the earliest opportunity. Please see the Suggested Actions section of this advisory for more information. Known Issues. Microsoft Knowledge Base Article 2661254 documents the currently known issues that customers may experience when installing this update. The article also documents recommended solutions for these issues. "
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