Windows 10: Bitlocker with Windows 10 and EFI/UEFI Bios and Legacy Bios + MBR or GPT disk

Hello,


I've read alot online about all of the scenarios for bitlocker and using Windows 10 with TPM 2.0. I've read things that said bitlocker encryption is not possible if it's a Win 10 box with TPM 2.0 bios in Legacy mode. It must be UEFI/EFI to work. Is this correct? Also in addition to this, I also read that you want UEFI + GPT formatted disk. Will encryption with bitlocker still work if you have say ... Win 10 UEFI + MBR formatted disk???? Or do have to have both UEFI + GPT disk format for bitlocker drive encryption??


I am hoping to clear this up.


Thank you!

:)

 

AHCI-legacy or IDE-UEFI intel board DP45SG

If your have Hard drive larger than 2TB

then repartition in GPT and make EFI bootable disk or USB drive then install windows

GPT has slightly faster boot time,

also OEM secure boot can activate in EFI

----

My Asus had 3 TB HDD and 250GB SSD, its EFI gpt, boots in 3 sec

Good Luck

 

GPT vs MBR for SSD OS Disk ? (win7 install)

So I cannot use all the new bios UI and fancy pre-boot evironiment if i don't use UEFI-boot ? With or without GPT?


I just want to use the UEFI without GPT: so can I UEFI-boot and install win7 with MBR?

Now I actually asked the correct question I wanted. Sorry it took time to figure out.

 

GPT vs MBR for SSD OS Disk ? (win7 install)

If I have UEFI BIOS, I'm going to use GPT. Only reason why I wouldn't is because the drive is shared between new and old computers (MBR has broader compatibility support). I wrote a guide how to install Windows on GPT here:
Installing Windows Vista/7 on a GUID Partition Table

No. Either you install on GPT via EFI boot or you intall MBR via BIOS boot. You can't install Windows and change it later.


Not only does GPT support booting to partitions larger than 2 TB, it also means the computer is booted using EFI which means it has a lot more memory to work with during startup. It should theoretically mean startup is quicker on EFI/GPT than BIOS/MBR.