A method includes requesting a computer in a network to install a first application and execute the first application, transferring one or more files to the computer, making modifications to the computer to install and execute the first application on the computer while recording the modifications, the modifications comprising allocating a resource to the first application, halting the first application on the computer, and reversing a portion of the modifications to the computer according to the recorded modifications. The reversing includes deallocating the resource from the first application. The method also includes making modifications to the computer to install and execute a second application on the available computer while recording the modifications, where the modifications include allocating the resource to the second application.