DH87RL - BIOS 0325 - Windows 8.1u1
If I reboot my system with FastBoot enabled results in Windows asking for the BitLocker recovery key. Further, I am unable to enter my key on most of the time as my USB keyboard is not recognized. I tried multiple keyboards. No issue with normal boot. I have Smart Response enabled with an mSATA SSD.
Hi arkiados, I believe this is an expected behavior because Fast Boot makes all USB devices unavailable until after the operating system boots. I recommend you disabling Fast Boot and if needed you can disable optical and network boot separately.
I am not a Bitlocker* expert but I believe it is because of the operation mode (TPM/PIN/USB Key). If the information below does not help I suggest asking this question to Microsoft*.
http://en.wikipedia.org/wiki/BitLocker BitLocker - Wikipedia, the free encyclopedia
http://windows.microsoft.com/en-us/windows7/what-is-a-bitlocker-recovery-key What is a BitLocker recovery key?