Answer: No. The Security Rule was written to allow flexibility for covered entities to implement security measures that best fit their organizational needs. The Security Rule does not specify minimum requirements for personal computer operating systems, but it does mandate requirements for information systems that contain electronic protected health information (e-PHI). Therefore, as part of the information system, the security capabilities of the operating system may be used to comply with technical safeguards standards and implementation specifications such as audit controls, unique user identification, integrity, person or entity authentication, or transmission security. Additionally, any known security vulnerabilities of an operating system should be considered in the covered entity’s risk analysis (e.g., does an operating system include known vulnerabilities for which a security patch is unavailable, e.g., because the operating system is no longer supported by its manufacturer).