Fazendo uma pesquisa mais detalhada no log de eventos do aplicativo, esta entrada ocorreu:
Log Name: Application
Source: Microsoft-Windows-CAPI2
Date: 24/10/2014 12:49:10
Event ID: 4108
Task Category: None
Level: Information
Keywords: Classic
User: N/A
Computer: [redacted]
Description:
Successful auto delete of third-party root certificate:: Subject [...redacted...]
Acontece que CAs raiz de terceiros podem ser excluídas pelo Windows se não forem reconhecidas:
Typically, a certificate is used when you use a secure Web site or when you send and receive secure e-mail. Anyone can issue certificates, but to have transactions that are as secure as possible, certificates must be issued by a trusted certificate authority (CA). Microsoft has included a list in Windows XP and other products of companies and organizations that it considers trusted authorities.