What are the processes that take place before Operating Systems over takes?

F

FarhanAfzal

New Member
I hope I am asking this question on the right thread. I was asked a question that the moment we press the Power button, what are the processes that take place untill the OS is loaded?


Thank you.
 
POST- Power On Self Test checks the hardware systems first then after that BIOS is loaded which calls the boot loader from which OS is loaded.
 
I'm guessing, the windows copies the error messages to ram. When the loading screen appears, it organizes said error messages, that's why it takes so long to load.
 
ayan said:
I'm guessing, the windows copies the error messages to ram. When the loading screen appears, it organizes said error messages, that's why it takes so long to load.
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Uh, what? That makes no sense and has nothing to do with POST. RAM is volatile memory, which means it is cleared every time it is turned off. There is no "sorting of error messages" that you speak of.
 
voyagerfan99 said:
Uh, what? That makes no sense and has nothing to do with POST. RAM is volatile memory, which means it is cleared every time it is turned off. There is no "sorting of error messages" that you speak of.
Click to expand...

<humor>I'm guessing, the windows copies the error messages to ram. When the loading screen appears, it organizes said error messages, that's why it takes so long to load.</humor>
 
larsch said:
The program code that does the POST resides in BIOS.
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The OP wanted to know what things take place before OS is loaded.
Processes doesn't always mean the OS processes, as POST is also a process of checking the hardware.
 
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