HI, the screen pops up what seems at random in the Heat of battle and it disarms you, not handy. F2 i found was the key to press that turns it on and off after it pops up. but also by the game pad if you press simultaneously both sticks down, the bit where you want to crouch on the right, and the one on the left at the same time.

Mean while, while you're navigating the F2 screen (i've no idea what it's uses for) and reloading your deadly weapons, some evil monster has in the meantime had you for tea.(Again!)

In some games you can go steam and create a new controller map (thing!), but i think you can't do that with Valheim, and and even if you can, if you can disable or rather not enable the double stick press.

cheers for the replies :-)
naturally a good rule would be 'do not press both down at the same time!' but not easy where you're being eaten.