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What is a necessary requirement for using Hibernation on a Windows notebook?

  1. Enough RAM

  2. Enough free hard drive space

  3. Updated operating system

  4. Battery backup

The correct answer is: Enough free hard drive space

Hibernation in a Windows notebook is a power-saving state that enables the computer to save the current session and completely power down. This is particularly useful for laptop users who may want to preserve battery life while keeping their work intact. To successfully utilize hibernation, it is essential to have enough free hard drive space. The system saves the contents of RAM, which includes all open documents and programs, to a file on the hard drive known as the hibernation file. This file, typically named "hiberfil.sys," must be at least the size of the amount of RAM installed in the system to accommodate all the data. If there isn't sufficient free space on the hard drive, the system won't be able to create this file, and hibernation will not work properly. While having enough RAM, an updated operating system, and battery backup are important for overall system performance and stability, the critical requirement specifically for enabling hibernation relates to the available free hard drive space to store the hibernation file.