Operating system must be loaded first so that other applications and programs will be able to work.
The operating system resides in secondary memory i.e., hard disk.when we boot our computer it is loaded into Primary memory i.e.,RAM and then loaded,this process is called booting
it is loaded on the ram of a computer ( memory ) and it is also loaded on a partiton of your hard drive if your operating systemwas installed when you broiught it it is partitiion 1
System software that is responsible for the functioning of all hardware parts and their interoperability to carry out tasks successfully is called an operating system (OS). OS is the first software to be loaded into computer memory when the computer is switched on and this is called booting.
The memory must be available, so no operating system can be loaded. Though technically there is no reason why you cant run it from a hard disk.
on the hard drive
The process of loading operating system software into a computer's main memory from disk begins when the computer is powered on and the BIOS or firmware performs a power-on self-test (POST). Afterward, it locates the bootloader on the bootable disk, which is responsible for loading the operating system. The bootloader reads the operating system files from the disk and transfers them into the main memory (RAM). Once loaded, the operating system initializes hardware components and prepares the system for user interaction.
Operating system
RAM
60 x 1073741824 bytes or 60 x 1024 mb generally when someone talks about memory it is volatile memory and is loaded when an application, game or software is loaded.
Whatever it wants, it now has total control of your computer.
windows xp
The operating system is loaded into the computers internal memory (RAM) at start-up. The operating system needs to 'reserve' chunks of memory to enable it to perform its functions swiftly and accurately. If a computer doesn't have enough RAM, the computer cannot run the operating system efficiently, often using empty hard-disk space - which slows down the computer.