Can I flash BIOS from msOS?

Yes, you can flash BIOS through the msOS.

• For Nvidia rigs follow the Nvidia VBIOS flashing article.
• For AMD rigs you can use BIOS flasher tool. Detailed tutorial is available in this blog post.
• For flashing BIOS through the console on AMD RX 400 / 500 series follow the AMD ATIFlash BIOS flashing for RX 400/500 [Polaris] article.
• For flashing BIOS through the console on AMD Radeon VII, Vega 56/64, and RX 5000 series follow the AMDVbFlash BIOS flashing for Vega 56/64, Radeon VII, and RX 5000 [Navi] article.

Please note that flashing BIOS is an advanced technique and it is not recommended if you don't know what you are doing as it can seriously damage your GPU.