The system image will contain a set of software common to computers used on the network. Using one of these images, the operating system can be installed on an unattended hard drive by copying the files to the disk. The process of starting3 a modern computer requires several steps. A power-on self-test (POST) is used to test the system before programs load. POST will test memory, video, fixed disks, and CPU (central processing unit) for compatibility and see if they are working properly. Programs are started from ROM (read only memory) stored on the main board of the computer. The BIOS (basic input/output system) loads into system memory and will access programs present on disk drives or fixed disks. The operating system will be loaded from a disk drive or SSD drive using the Windows Boot Manager. The operating system will continue the boot process with the Windows bootloader during a normal startup. When the operating system starts, programs start in a specific order. This is determined by the authors of the operating system. Services and programs start as each is expected, unless problems are detected by operating system programming. Once the kernel and all other startup programs are loaded, a login phase is initiated.