Laptop's BIOS is continuously pressing some key [Closed]

Registration date
Saturday April 9, 2016
Last seen
April 9, 2016
My laptop's BIOS is continuously pressing some key. I can't figure out which key but all I know it's most likely some alphanumeric key. So far the only text fields I could actually get access to are password fields (asking for Windows password). I can't type the password because it gets filled with this keypress and it's real fast. I have tried to use FilterKeys (I can turn it on through the login screen's accessibility button) - it slows down the continuous stream of keypresses, but it's not slow enough for me to put my password in.