The techniques and systems disclosed herein pertain to preventing unauthorized access to computing resources by unauthorized persons by deploying biometric security. To implement biometric security, the computing device, possibly by the OS, may obtain samples of one or more biometric factors unique to the owner. The computing device may construct pattern-matching templates corresponding to the biometric samples, which may be stored for later use when a protected resource is requested. Computing resources may be selected for protection by a biometric security mechanism by an authorized user or by other techniques or default settings. Before allowing certain restricted actions, the OS may request that the user provide one of the previously registered biometric samples. If the biometric sample matches the user's stored pattern-matching template, the OS may grant access to the computing resource, otherwise, the OS may deny access to the computing resource.