Lenovo preinstalled on some models (photo of a Lenovo Yoga 11 3 ©Pierre Lecourt) of its PC a utility called Lenovo Service Engine (LSE) that sends to its servers some information at the first connection to the Internet, according to the company anonymously. LSE automatically downloads another utility, OneKey Optimizer (OKO), which is supposed to optimize the operating system through some operations. LSE was discovered to use a technique that allows it to be automatic reinstalled even when the whole operating system is reinstalled from scratch and that can be a security problem.