New observations: IRST conflicts even after being removed:
How to reproduce:
1 Clean Windows install
2 Install mentioned IRST version
3 Try Bitlocker: uses software encryption
4 Uninstall IRST
5 Try Bitlocker: Wizard uses hardware encryption, but after system check reboot, Bitlocker dissapears from Windows. No lock sign on drive. It asks for a password on boot, but pressing ESC just boots the pc, meaning it's not encrypted. Doing 'manage-bde -status C:' in CMD gives:
ERROR: The volume C: could not be opened by BitLocker. This may be because
the volume does not exist, or because it is not a valid BitLocker volume.
The only way I have found to get everything back to normal is reinstalling Windows. You can't disable or properly enable it without reinstalling
When I just clean install Windows and then encrypt, without ever having IRST, it works as expected.
I can confirm same issue.
Installing latest Intel AHCI Driver during WiX setup process, it is impossible to use bitlocker Hardware encryption.
It is possible to install these drivers later, but then WiX is loosing the bitlocker settings, but is still encrypted.
I' tried more then 10 times to install with Intel drivers without succss.
I am using Windows 8.1 Pro x64 with a Samsung 850 Pro SSD. The hardware encryption is no problem when Intel RST 126.96.36.1993 is installed.
When I install the new RST 188.8.131.529, the system is very very slow and the hardware encryption is not detected anymore.
The only way back is to do a system recovery of an older recorvery point.
If you want to use the eDrive with BitLocker, please don't install Intel RST 184.108.40.2069!
The Intel RST 220.127.116.113 has no problem with eDrive and BitLocker.
Thank you very much.
This was the reason for my question here.
The new drivers are crap and cannot be used for Bitlocker eDrive.
The RST Driver release 18.104.22.1683 worked with Win 8/8.1 but these drivers do not working with Windows 10.
The native Windows 10 SATA AHCI drivers deliverd by Microsoft are working very well.
The Microsoft native drivers are working very well.
No need for me to test Inteldrivers for the moment.
But I want to know for future Windows 10 Installation, do these Intel drivers work with bitlocker......or which release is working with Windows 10?
You can read here the latest Intel RST drivers do not work with bitlocker under Windows 8.1 Pro ....
As of now, the recommendation would be to wait for a new driver release that could have a fix for this issue.
Please refer to the release notes in the link below, where all the known and fixed issues are noted (for future references to check if this is added in the fixes).