MBR2GPT Cannot Find Room for the EFI System Partition Error, How to Fix?

I'm attempting to use the MBR2GPT utility to convert from MBR to GPT in order to transition from Legacy BIOS to UEFI. I'm following the instructions on this site. The validation was successful. However, I am still encountering an error when converting: cannot find room for the efi system partition. I need help to fix this. Thanks.

Best Answered by

Roxanne· Answered on Oct 19, 2023

When the system/ C drive on your computer has insufficient free space, you may encounter the "cannot find room for the EFI system partition" error. Besides, it may appear when there is no unallocated space on your hard drive. Luckily, I will offer you a solid and effective solution for this error.

Before delving into the detailed steps, you'd better check if your motherboard of the computer supports UEFI boot mode:

📖Read AlsoHow to Know If Windows Using UEFI or Legacy🔥

How to Fix Cannot Find Room for the EFI System Partition

To solve this error efficiently, you need a professional partition manager. EaseUS Partition Master can be your versatile companion and empower you to extend C partition and create unallocated space. Below are two applicable features of EaseUS Partition Master:

Option 1. Low Disk Space

Step 1. When your C drive has extremely low space, EaseUS Partition Master will warn you in the "Partition Manager" section. It will pop an "Adjust with 1-Click" option. Click it to extend the C drive.

Step 2. You can extend the C drive by clicking "Manual Adjustment." Last, select "OK" to finish.

Option 2. Extend C Drive Without Unallocated Space

If you haven't received the low disk space warning and have no unallocated space on the hard drive, you can turn to the "Allocate Space" in this software:

Step 1. On the system disk, right-click a large partition with enough free space and choose "Allocate Space."

Step 2. Drag the end of the System C drive into the available space after selecting the system drive in the Allocate Space From (*) To section. To confirm, click "OK".

Step 3. To save the changes and expand the C drive, select "Execute Task" and then "Apply."

Prime Alternative - EaseUS Partition Master

MBR2GPT utility requires some technical skills of command lines or background information, which is unfriendly to computer savvies. In addition, any incorrect operation will lead to various errors. Thus, I highly recommend you use EaseUS Partition Master to convert MBR to GPT and boot via UEFI boot mode. Read the following article and learn more:

🚩Read More: How to Change BIOS Mode from Legacy to UEFI

People Also Ask

I Am Not Able to Convert Mbr to GPT, Need Help

Are you looking for a solid way to solve not able to convert MBR to GPT problem? Calm down. This post will teach you how to fix the issue with a full guide.


Jul 31, 2023

Should I Convert Drive From MBR to GPT to Use UEFI

Are you confused that you are not sure whether should I convert drive from MBR to GPT to use UEFI? This passage will tell you the answer, and you can read this passage.


Jul 31, 2023

Is It Possible to Convert from MBR to GPT, Keeping Installation and Programs?

Many users are worried about: Is it possible to convert from MBR to GPT, keeping installation and programs. This article will answer your question and give you a full guide on converting and changing boot mode.


Jul 31, 2023

Insufficient Disk Space on Mail Server, How to Free Up

If you can't use more than 2TB of space on Windows Server, it may be due to partitioning style. This article will provide the best ways to help you expand the space on your Mail Server and solve the insufficient disk space.


Jul 31, 2023

Why Can't Convert to GPT on Windows 10? I Need Help

There may be several possible reasons behind this issue, and this article helps solve the can't convert to GPT issue via a simple way.


Jul 31, 2023

What to Do If I Want to Convert GPT to MBR Without Accessing an OS? Help

Are you using a computer without a Windows system and wondering what to do if I want to convert GPT to MBR without accessing an OS? Don't worry. This article will provide two direct solutions to help you out.


Jul 31, 2023