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No, no drivers are loaded until windows is logged in, windows isn't booted up until that point.So the boot squence is BIOS (POST), then the Windows Boot Manager, then Windows OS Loader and then Windows NT OS Kernel.
So once past POST, it's the OS (Windows, Linux, etc) that continues the boot process. My thinking is that the generic VGA driver loaded as part of Windows OS Loader or OS Kernal step is corrupt and causing the display issues.
Drivers simply link the hardware calls from OS to the BIOS.