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On system with BIOS firmware, the BIOS invokes MBR boot code from a hard disk drive at startup. The MBR boot code and the VBR boot code are OS-specific. In Microsoft Windows, the MBR boot code tries to find an active partition (the MBR is only 512 bytes), then executes the VBR boot code of an active partition.
Screenshot of Windows 8's Settings app. Screenshot of Windows 8.1's Settings app. The first generation of the app, called "PC Settings" was included with Windows 8, Windows Server 2012, Windows 8.1, and Windows Server 2012 R2. On Windows 8, the PC Settings app was designed as a simplified area optimized for use on touchscreen devices.
On machines using a PC-AT real-time clock, by default the hardware clock still has to be set to local time for compatibility with BIOS-based Windows, [52] unless using recent versions and an entry in the Windows registry is set to indicate the use of UTC.
The BIOS typically sets up a real mode interrupt handler at this vector that provides video services. Such services include setting the video mode, character and string output, and graphics primitives (reading and writing pixels in graphics mode).
The BIOS uses the boot devices set in Nonvolatile BIOS memory , or, in the earliest PCs, DIP switches. The BIOS checks each device in order to see if it is bootable by attempting to load the first sector (boot sector). If the sector cannot be read, the BIOS proceeds to the next device.
Removed in Windows 10, and moved to the Settings App. Date and Time (timedate.cpl) Allows user to change the date and time stored in the machine's BIOS, change the time zone and specify whether to synchronize the date and time with an Internet Time Server and which server to use. Display (control desktop) (desk.cpl)
Access and change BIOS settings remotely. [1] This feature is available even if PC power is off, the OS is down, or hardware has failed. This feature is designed to allow remote updates and corrections of configuration settings. This feature supports full BIOS updates, not just changes to specific settings. Detect suspicious network traffic.
Advanced Configuration and Power Interface (ACPI) is an open standard that operating systems can use to discover and configure computer hardware components, to perform power management (e.g. putting unused hardware components to sleep), auto configuration (e.g. Plug and Play and hot swapping), and status monitoring.