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  2. Safe mode - Wikipedia

    en.wikipedia.org/wiki/Safe_mode

    Also, in a multi-boot environment with multiple versions of Windows installed side by side, the F8 key can be pressed at the OS selector prompt to get to safe mode. However, under Windows 8 (released in 2012), the traditional press-F8-for-safe-mode-options UI convention no longer works, and either Shift-F8 or a special GUI-based workaround is ...

  3. Booting process of Windows - Wikipedia

    en.wikipedia.org/wiki/Booting_process_of_Windows

    The boot loader is responsible for accessing the file system on the boot drive, starting ntoskrnl.exe, and loading boot-time device drivers into memory. Once all the boot and system drivers have been loaded, the kernel starts the session manager (smss.exe), which begins the login process.

  4. List of Microsoft Windows components - Wikipedia

    en.wikipedia.org/wiki/List_of_Microsoft_Windows...

    The boot loader; performs basic system initialization options such as loading the hardware abstraction layer and boot-time device drivers, prior to passing control to the Windows kernel. In versions prior to Vista, NTLDR and IA64ldr also display menus to the user if multiple operating systems are defined in boot.ini, or if F8 is pressed.

  5. Single-user mode - Wikipedia

    en.wikipedia.org/wiki/Single-user_mode

    Boot-loader options can be changed during startup before the execution of the kernel. In FreeBSD and DragonFly BSD it can be changed before rebooting the system with the command nextboot -o "-s" -k kernel , and its bootloader offers the option on bootup to start in single-user mode.

  6. Session Manager Subsystem - Wikipedia

    en.wikipedia.org/wiki/Session_Manager_Subsystem

    The Session Manager Subsystem is the first user-mode process started by the kernel. Once started it creates additional paging files with configuration data from HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management, [1] the environment variables located at the registry entry HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Environment, and DOS device mappings (e.g. CON ...

  7. ntoskrnl.exe - Wikipedia

    en.wikipedia.org/wiki/Ntoskrnl

    The upper part is accessible only from kernel mode, and with some exceptions, is instantiated just once, system-wide. ntoskrnl.exe is mapped into this region, as are several other kernel mode components. This region also contains data used by kernel mode code, such as the kernel mode heaps and the file system cache.

  8. Magic SysRq key - Wikipedia

    en.wikipedia.org/wiki/Magic_SysRq_key

    Display all currently held Locks (CONFIG_LOCKDEP kernel option is required) d: e: d: s: Send the SIGTERM signal to all processes except init (PID 1) e. e: f: Call oom_kill, which kills a process to alleviate an OOM condition f: u: f: t: When using Kernel Mode Setting, switch to the kernel's framebuffer console. [5] If the in-kernel debugger kdb ...

  9. Real mode - Wikipedia

    en.wikipedia.org/wiki/Real_mode

    Unix, Linux, OS/2, Windows NT are considered modern OS's as they switch the CPU into protected mode at startup, never return to real mode and provide all of the benefits of protected mode all of the time. 64-bit operating systems use real mode only at startup stage, and the OS kernel will switch the CPU into long mode. [2]