Upgrade BIOS to UEFI Before You Want to Convert MBR to GPT


What is BIOS and UEFI?

Most people may be familiar with a PC’s BIOS. Put simply, see picture below please:

BIOS


The BIOS stands for Basic Input-Output System. When your computer starts up, it’s the BIOS’s task to activate the various components and make sure they’re functioning, then it passes off functionality to your operating system or another boot loader.

The Unified Extensible Firmware Interface, UEFI for short. Can be said an updated version of the old BIOS, easy-to-use, mouse-capable. It is also the key to booting Windows on a disk bigger than 2 TB, known as GPT disk. Some new motherboard comes with the old BIOS and supports the new UEFI.

UEFI


You can upgrade BIOS to UEFI directly switch from BIOS to UEFI in the operation interface(like the one above). However, if your motherboard is too old model, you can only update BIOS to UEFI by changing a new one. It is very recommended for you to perform a backup of your data before you do something.

Convert MBR to GPT without losing data

After you have upgraded BIOS to UEFI, you can convert MBR disk to GPT and reinstall Windows operating system and so on. Specific situation refer to the table below:


Operating System
Data Access
System Boot
Windows XP 32-bit
Not Support GPT
Not Support GPT
Windows XP 64-bit
Support GPT
Not Support GPT
Windows Vista 32-bit
Support GPT
Not Support GPT
Windows Vista 64-bit
Support GPT
Support GPT(Need UEFI)
Windows 7 32-bit
Support GPT
Not Support GPT
Windows 7 64-bit
Support GPT
Support GPT(Need UEFI)
Windows 8 32-bit
Support GPT
Not Support GPT
Windows 8 64-bit
Support GPT
Support GPT(Need UEFI)


About converting MBR to GPT, I recommend you use AOMEI Partition Assistant, which is a highly-efficient, easy-to-use and multi-function partition management software, with user friendly operations to assist you manage the partitions of your hard drives. Under the help of Partition Assistant, you can easily & fast create/delete and merge/split the partition and the most advantage is that it resize/move your partition to readjust the partition volume on the basis that it ensures the security of your data. Its new function “Windows to go creator”is amazing.

Interface of AOMEI Partition Assistant


It supports different versions of Windows depending on different software editions. In general, it works on Windows 2000/XP/Vista/7/8/8.1, Small Business Server 2011/2003/2008, Windows home server 2011 and Windows Server 2003/2008/2012 (both 32bit and 64bit). More functions of AOMEI Partition Assistant, please visit here.