1. A method in a computing device for determining impact on software components of updates to a software system, the method comprising: receiving from the developer of the software system a patch for the software system, the patch for updating the software system and providing an identification of resources affected by the update to the software system, the resource identification including a version of the affected resource; updating the software system by applying the patch to the software system wherein the identified resources are affected by the updating; after updating the software system, identifying the software components currently executing on the computing device; and for each identified software component, during execution of the software component, identifying by the computing device resources accessed by the software component by tracking accesses of the software component to the resources; and for each accessed resource that corresponds to an identified affected resource, determining whether the version of the affected resource is the same as the version of the accessed resource; and when the version of the affected resource is not the same as a version of the accessed resource, indicating that the identified software component is accessing a version of the accessed resource that is different from the version of the affected resource and thereby accessing an out of date resource.