Ok interesting problem. I have a new tablet which I need to secure (LINX8) which I need to secure fully encrypted with pre-boot authentication. The tablet is kept within a case with a micro USB keyboard so password entry on power on is not an issue. Normally I would use TrueCrypt - but this failed me in the case because the tablets 32gb SSD drive comes partitioned with GPT instead of ye-old-e MBR. Other programs like DiskCryptor recognise it but screw up because encrypting the Windows partition cause is to fail to boot - it boots into recovery mode and all you can do is full device reset which formats and rewrites the partition. The issue here is the drive has a hidden partition (EFI boot). The encryption programs cannot see this - but Acronis TrueImage showed it up. In addition the device has an "Images" partition, which has no drive letter; but is an NFTS partition that contains the WIM files - the Windows installation uses them (WimBoot mode). I am not worried about this part been encrypted since data won't be written here. BitLocker is not an option as the Windows version is not Pro but the 8.1 with Bing. My options seem much reduced. At a push I could attach a USB DVD and reinstall Windows 8.1 (edition of my choice) directly on the device - but then I lose the nice WimBoot mode unless I go about making my own ... which is not an option time wise. The device also has free office 365 which is tied to the OS that I would lose doing this approach. Seems to me tablets setup in this way are designed NOT to be possible to secure. I always thought not Microsoft missed something here with Win8.x when they went tablet mad by not making it feasible to secure. Just about everything puts a blocker on it. So, how would you proceed?