This one is easy, the answer is the user is disconnected from Windows Explorer and a partition of the hard-drive.
Windows Explorer is everything that allows you to navigate a windows operating system: documents, taskbar, desktop... ect, so when the user 'logs off' the computer, windows explorer process is shutdown.
The user is also disconnected from the hard drive but the system is not, this is because if there are multiple accounts on the computer, then other accounts can access their personal space on the hard drive.
Aslong as the computer is switched on, even at logon screen power is still being consumed to run the computer's operating system and files which are ready for the user to log back on.
This usually happens when power is disconnected from the computer unexpectedly. A critical error in the system might possibly cause this, but that is very unlikely.
Hibernation
If not currently written to or read from, connecting or disconnecting a drive will not affect the device or computer. While in the specification, SATA hot-swapping is listed, depending on the feature's hardware and software implementation, actual usefulness of this feature will vary! Windows 10 version 1909 does not realize that a drive has been connected or disconnected. For these changes to be visible in Windows Explorer, Diskpart, etc., the computer needs to be rebooted.
when the wire is disconnected from the dry cell you feel not hot
Your internet explorer may be infected with spyware or it may have lost the 128 bit encryption
It depends on the light bulbs. Some will all go out once one is disconnected and only that one that got disconnected will go out.
When the TPS sensor is disconnected from the car in idle, there would be delayed acceleration.
current decreases and resistance increases
Often when a Chrysler Corp. vehicle has a dead battery or the battery is disconnected, the computer will loose it's configuration. When that happens it will display the "no bus" message. You may need to take it to the dealer to have the computer re-configured unless you have a smart friend who can do it for you..
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If you mean the HAL 9000 computer in the original 1968 film - it was disconnected by 'Dave' - one of the crew aboard the ship - gradually removing HAL's memory chips. It sings the song "Daisy, Daisy" as it's being shut down.
Dora the Explorer - 2000 What Happens Next 3-16 was released on: USA: 2004