Windows 10 BitLocker on bootup presents just a blue screen but no password box or text.

The fix here worked for me:

• Open a CMD session as Admin

• Use the command bfsvc.exe %windir%\boot /v.

• After a restart, the texts should reappear.

  This fixed the issues for me.

Same here:

Solved this problem using this answer: http://answers.microsoft.com/en-us/windows/forum/windows8_1-security/bitlocker-pin-pre-boot-screen-empty/f985c4f6-dd71-4586-bd46-50f513432bb3?auth=1

The moment it started talking about fonts I realised - maybe everything is working just fine - just the text isn't displayed.

Type your password as usual and hope Microsoft will update the thing