@nikith-reddy Is your machine defined to boot to pxe first? This is normally expected.
Is it never going to the OS? If so, you may need to check the boot options in the BIOS to see if it detects the hdd’s available OS’s.
If it is going to the OS, then i’m not really seeing the issue. If you don’t want FOG PXE to boot at all, then you’ll have to adjust the BIOS to tell it to not boot to PXE/UEFI Network Stack.