1. A method performed on a computing device, the method comprising: initiating, by the computing device, a startup sequence of an instance of an operating system of the computing device; detecting, by the computing device in response to the initiating, a hibernation file that corresponds to a prior shutdown sequence of the instance of the operating system; determining, by the computing device, that no other instance of the operating system or instance of another operating system of the computing device has been started since the detected hibernation file was created; and completing, by the computing device in response to the determining and based on the detected hibernation file, the startup sequence.