The installation process depends on which emulator you are using:
: Go to Tools > Install Firmware > Install a firmware from XCI or ZIP and select your downloaded v15 firmware package. For Yuzu (via EmuDeck or Standalone): Download switch bios v15 bin
: Place the prod.keys and title.keys files into the keys folder (usually located in AppData/Roaming/yuzu/keys ). The installation process depends on which emulator you
: Open Ryujinx, go to File > Open Ryujinx Folder , and place your prod.keys file in the system folder. Download switch bios v15 bin