Oracle Database is increasingly integrated with Windows, easing maintenance and improving enterprise-level deployment in security, directory, and transaction services.

• Oracle PKI Integration with Windows
  Oracle Advanced Security includes Oracle PKI (public key infrastructure) integration for authentication and single sign-on. You can integrate Oracle-based applications with the PKI authentication and encryption framework, using Oracle Wallet Manager.
• Oracle Fail Safe Integration with Windows
  Oracle Fail Safe ensures that Oracle Database (and also other Oracle and third-party applications) can be configured and managed for high availability on Windows clusters. An instance runs on only one node at a time.
• Oracle Services for Microsoft Transaction Server
  Microsoft Transaction Server (MTS) is used in the middle tier as an application server for COM objects and transactions in distributed environments.