Patching operating systems may be more critical than patching applications. While applications may be the action, the operating system enables the action. We all think of the ubiquitous Windows operating systems but should never overlook Linux, Unix, Mac, mobile platforms, and even IoT and network appliances. Like applications, products are released with imperfections and by various means, the vendors endeavour to resolve those imperfections. Wannacry and Petya are recent examples highlighting the need for a patching strategy. Get informed, get involved, and get protected by making it part of your regular maintenance. Acquire patches, verify their purpose, test, and deploy.