Okay, so I have a few copies of tails on a few USBs for updating purposes. With the 3.0-3.1 updates I have been unable to use my mouse and keyboard. I've kept a lower version (like 2.4 or something) and that one still seems to work fine on my computer, however on 3.X (two different USBs) I am unable to move my mouse or use my keyboard to even click login. It's funny because I can choose troubleshooting mode or regular mode, but after booting into Tails it no longer works. I am using a Windows PC as the machine
Its a common issue caused by a usb conflict. Either change the usb or the keyboard and mouse.