ASUS Z270-A

I'll get straight to the point... I have an ASUS Z270-A motherboard with an I7 7700K and I want to update my bios. My current bios version 1203. The new one is Version 1302. My question is can I update my bios through windows without a USB, or do I have to use a USB to update it, and if so, how...

I recently bought a new Asus Strix gtx 1060 6gb OC. Before upgrading to 1060 I was sporting a GTX 770, but within a margin of roughly 10 FPS in-game, i had no performance boost what so ever. I have tried everything from reinstalling graphics drivers, to reinstalling Windows. And this is...