विंडोज (Windows) ऑपरेटिंग सिस्टम में, कौन सी विशेषता उपयोगकर्ता को व्यक्तिगत फ़ाइलों को प्रभावित किए बिना सिस्टम को पिछली स्थिति में वापस लाने की अनुमति देती है?

Which service of an operating system manages the allocation of hardware resources such as main memory, CPU cycles, and file storage to different users or tasks in a multi-user environment?

Identify the operating system from the following options that is primarily designed for mobile devices rather than standard desktop computers or laptops.