recover stock bios after mod laptop g501jw

Hi
about 4 or 5 years ago I moded my gpu for overclocking which I think It was the whole mainboard bios mod because the gpu is on the mainboard based on (as I remember vbios v2 maxwell mod)
now I see cpu clocking issues and getting high temprature and issues all over the performance.
I want to recover my stock bios and rewrite it again on my device. what should I do?
I have the latest build windows 10 pro now. I already tried to winflash (with /nodate trick to downgrade the bios to my old bios) but I get stuck at asustek easy flash utility blue screen and I have to turn the device off.
I would appreciate you help me through this.
thanks

Hi
any answers and guides?

Windows method for this kind of operation is not advisible…as u saw.
OS independent method or CH341 programmer… careful with system identification data, SN, UUID etc…
There’s a high risk of operation failure in this action… due to upgrades in bios structures made by updated bios versions.