Hello I think, yet I'm not 100% sure that Nvidia? did something to prevent loading drivers on cards with a modified bios. At least this happen in my case. Yestarday I did a fresh installation of 387.92 win10 64bit driver. BOOM, error 43 on a super fresh Win 10 instalation. Ok, I did a quick rollback to a 385.41 series and guess that? It works. Later I reinstalled again 387.92, the same. error 43. I thought that this could be somehow caused by my modified bios. Yeah, Im using a tweaked bios with a simple voltage mod, nothing fancy. After I rolled back to my original bios, 387.92 loaded fine, no errors. And no, this is not a broken bios, os, card or something. Whenever I rollback to 385.41 everything works as it should with my modified bios. I've been using this bios for almost 2 yeas with no problems. md5 checksum dumped from my gpu bios is the same, so it's not a corruption or something. This is realy weird, and I'm lost and out of ideas. For now I can't use 387.92 with a modified bios WTH is going on.