What does CTRL-ALT-DEL actually do, when at the BIOS screen?
- Sends an interrupt 999 to the CPU
- Sends an interrupt 0 to the CPU
- Sends an interrupt 443 to the CPU
- Sends an interrupt 9 to the CPU
EXPLANATION
If Ctrl+Alt+Del is executed before Windows is to a point where it can intercept the command, BIOS
will simply restart the computer. Ctrl+Alt+Del might also restart the
computer while in Windows if Windows is locked up in a certain way. For
example, using Ctrl+Alt+Del during the Power On Self Test reboots the computer.
In Windows 3.x and 9x, if Ctrl+Alt+Del is quickly pressed twice in a
row, the system will immediately start a reboot without safely shutting
down any open programs or processes. The page cache
is flushed and any volumes are safely unmounted, but there isn't an
opportunity to cleanly shut down running programs or save any work.
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