Windows Vista comes with an excellent tool to help prevent your system files, folders, and Registry from becoming compromised, which is User Account Control Virtualization. UAC Virtualization helps prevent applications from writing to protected system resource locations by redirecting the “Writes” to a location where the user has access, which is their own personal profile. The end result of this virtualization is that the user is still able to run these applications, but the data that is written by the application is not sent to the system location, helping protect the stability of the overall operating system. With the virtualization, it also means that multiple users are now able to run the application on the same computer, as each of their personal data is written to their own user profile. In this article, I will show you how to control UAC virtualization using Group Policy, the Registry, and Task Manager.