- Check if you are using UEFI or BIOS.
- Open the System Information app by doing either of the following:
- Open the Run window, type "msinfo32" and then click OK.
- Search for "System Information" using Windows Search.
- Verify the BIOS Mode. If "Legacy" is indicated, your system is using BIOS.
- Open the System Information app by doing either of the following:
- Check if the System drive is NVMe drive compatible. Refer to this KB article:
Self-encrypting drive compatibility list for Endpoint Encryption
- SATA mode is RAID.
- In BIOS setting, switch the SATA mode from RAID to AHCI.
- Boot into preboot.
- Login to recovery console.
- Decrypt the disk, if it is not decrypted.
- Restore preboot partition.
- Boot the computer to the Windows CD.
- Run the following commands:
bootrec /fixboot
bootrec /fixmbr - Reboot the computer. The computer should now be able to boot to the Windows login screen and authenticate successfully.
- Switch the SATA mode from AHCI back to RAID (Otherwise Windows may not boot).
- Uninstall Full Disk Encryption (FDE) by executing the following command:
MsiExec.exe /X{17BACE08-76BD-4FF5-9A06-5F2FA9EBDDEA}.
If an error saying that FDE is incompatible with the hardware, FDE must be uninstalled. Following the steps below:
- Navigate to C:\Program Files\Trend Micro\Full Disk Encryption\.
- Run the TMFDEUninstall.exe file.
You may need to follow the steps provided in the links below to switch from RAID mode to AHCI mode:
- For Windows 8 or Windows 10: https://support.microsoft.com/kb/2795397
- For Windows 7: https://support.microsoft.com/kb/922976
The alternative solution is to reinstall the OS with AHCI mode.