I'm trying to install on a Windows Server 2012 machine that has very stringent security requirements. When I go to install the driver, it fails with this in the setupapi log:
An unexpected error occurred while validating driver package. Catalog = arduino.cat, Error = 0x800B0101
Driver package is considered unsigned, and Code Integrity is enforced.
Driver package failed signature validation. Error = 0xE0000247
Arduino.cat is signed with a certificate that expired on 12/19/13. I think I can work around it for the short term, but long-term, I need an update to that certificate.
(No, I can't install on a different machine or lower the security requirements, so please don't suggest that.)