Loading OS via Master Boot Record

[G309216C]

Hi,

I have successfully wrote to the MBR (Master Boot Record), the program was a "Hello World!" and wrote it to Windows
The Entry Point of the Bootloader:

.286							  
.model TINY						 
extrn				_EntryBoot:near	   
.code   
org				07c00h		  
main:
				jmp short start	   
				nop
start:	
        cli
        mov ax,cs               
        mov ds,ax               
        mov es,ax               
        mov ss,ax                  
        mov bp,7c00h
        mov sp,7c00h            
        sti 
        call           _EntryBoot
        ret
        
        END main               

As for the EntryBoot function it is quite obvious on what it does. It prints out specified text which would be defined (with a #define tag).

Now all I want to do is to load any version of Windows which does not support a hot-patch prologue for KiFastSystemCall function in Ring3 such as XP sp3 , Vista , Windows 7 don't know if KiFastSystemCall has a hot-patch prologue in Windows 8. Obviously this means that that the Kernel should be x86 but it also must be x86 because if the OS is x64 the Patch Guard will stop it from writing

Any ways how can I find the the kernels of those listed OS.

Thanks!