Yes the BIOS mode is UEFI, it is also GPT, I made sure the installer was setup to only install GPT partition scheme for UEFI based systems on this laptop. I am being told this is due to it being a NVMe device and bitlocker doesn't support it? System Information report written at: 11/18/17 22:32:31 System Name: DELL-XPS [System Summary] Item Value OS Name Microsoft Windows 10 Pro Version 10.0.16299 Build 16299 Other OS Description Not Available OS Manufacturer Microsoft Corporation System Name DELL-XPS System Manufacturer Dell Inc. System Model XPS 15 9560 System Type x64-based PC System SKU 07BE Processor Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz, 2808 Mhz, 4 Core(s), 8 Logical Processor(s) BIOS Version/Date Dell Inc. 1.5.0, 30/8/17 SMBIOS Version 3.0 Embedded Controller Version 255.255 BIOS Mode UEFI BaseBoard Manufacturer Dell Inc. BaseBoard Model Not Available BaseBoard Name Base Board Platform Role Mobile Secure Boot State On PCR7 Configuration Binding Possible Windows Directory C:\Windows System Directory C:\Windows\system32 Boot Device \Device\HarddiskVolume2 Locale United Kingdom Hardware Abstraction Layer Version = "10.0.16299.15" Username DELL-XPS\gonzo Time Zone GMT Standard Time Installed Physical Memory (RAM) 32.0 GB Total Physical Memory 31.8 GB Available Physical Memory 25.3 GB Total Virtual Memory 36.6 GB Available Virtual Memory 29.8 GB Page File Space 4.75 GB Page File C:\pagefile.sys Virtualisation-based security Not enabled Device Encryption Support Reasons for failed automatic device encryption: Un-allowed DMA-capable bus/device(s) detected Hyper-V - VM Monitor Mode Extensions Yes Hyper-V - Second Level Address Translation Extensions Yes Hyper-V - Virtualisation Enabled in Firmware Yes Hyper-V - Data Execution Protection Yes
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