What
is this screen telling me? When I booted it said I had to enter my BitLocker key to continue. I did, but now it is showing this every time it starts up. I confirmed that BitLocker is active for my primary storage but not for my microSD Which is what I prefer.
But it has been this way for a couple of weeks and has not had this screen on boot.
It means that ur sp4 security is unlocked allowing booting to other operating systems. You can re-secure it by entering the UEFI(aka BIOS) and enabling the security setting.