Power off the computer, and insert or connect the Windows installation DVD or USB drive.Ensure that all files have been backed up to a different hard drive or storage device before following the instructions below.Ĭonverting to GPT format using Command Prompt in Windows Setup How to convert a disk from MBR to GPT format Converting from MBR to GPT using Command PromptĬaution: Converting a disk drive from MBR to GPT or conversely erases all data from the drive. If you are upgrading your computer to Windows 10, Windows 8, and 8.1, it is recommended you convert the hard drive to GPT format. Windows 10, Windows 8, and 8.1 operating systems on Dell computers that were downgraded to Microsoft Windows 7 at the factory were shipped with the hard drive set to Master Boot Record (MBR) format. To boot your computer in UEFI mode, you must use a drive formatted using the GPT drive format. The Windows 10, Windows 8, and Windows 8.1 operating systems can use the UEFI BIOS, which can speed up boot and shutdown times and provides additional security advantages. GUID Partition Table (GPT) takes advantage of UEFI BIOS to support storage devices larger than 2TB and lets you set up as many partitions as you need (Microsoft Windows supports up to 128 partitions on a GPT drive). ![]() Why should I convert my hard drive to GPT?
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