I cannot access the BIOS. Initially, I accessed the BIOS with the escape key to make the fn keys default to media keys. After this, the escape key no longer boots into the BIOS, even in combination with the ctrl, fn, and alt keys applied. F7 and Delete don’t do the trick either.
After trying and failing to access the BIOS, my trackpad no longer works. There is no cursor on the screen and I’m forced to use the keyboard and touch-screen. An external mouse does work. Windows Device Manager does register the trackpad (HID-compliant touch pad). Disable/Enable and Uninstall/Installation of the device have no effect.