I found a Russian Program called TNT Edit but everytime i download Windows defender goes nuts does anyone know of a good program to use or if that one is safe?

Background is my ASUS Riva TNT2 Pro has started to have it's ram fail at the rated 166mhz, i get random purple dots but they go away at 160mhz, i stress tested for 24 hours and no dots, so I want to flash the card down to 160mhz from 166, while I can do this with coolbits i want a more permeant solution until I feel confident replacing the SDRam on the card myself.

So what do yall recommend or is this TNT Edit program safe

https://nvworld.ru/utilities/tntbiosedit/