![]() ![]() Many systems don't have it enabled by default. You may have to reboot to have the option appear. On a Windows 7 system, you can enable and disable the hibernate feature by issuing the command powercfg -h at a command prompt, e.g., powercfg -h on to enable hibernation. So, really, what is the real difference between Sleep and Hibernate (and why do some systems only have the former option and not the latter)? This appears to contradict what I thought. However, what I find is that in both cases the screen goes balnk and the session is immediately locked (so that the user has to log in again once they want to resume work on the computer), and in both cases, after approximately the same amount of time (perhaps 8 minutes), the hard drive stops spinning and the computer becomes completely silent. Whereas Hibernate copies the contents of memory to disk, and restores them to disk once a keyboard key or mouse button has been clicked. ![]() I've always thought that the difference between Sleep and Hibernate is that Sleep makes the screen go blank, while the hard drive keeps spinning. Judging from the following pictures, found on the Internet, it seems like some Windows systems come with both a Sleep option and a Hibernate option, whereas others only have a Sleep option. At the bottom of the start menu, when I click the arrow next to "Shut Down", here is what I see (I have listed the correspondence between the entries in Italian and those in English below the image): I am running a localized (Italian) version of Windows 7. ![]()
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