How to Clone Windows 7 to New Hard Drive Without Reinstallation?

In this post, we will share you with the best tool to clone Windows 7 to new hard drive, which allows you to directly transfer Windows 7 operating system from one hard drive to another one without reinstallation or clone the whole Windows 7 hard drive effortlessly.


By Emily / Updated on April 29, 2024

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Wrap things up

User Case: Can I clone my Windows 7 to new hard drive?

"I suspect that my current OS (Windows 7) hard drive is likely to fail soon. So I want to know how to transfer my OS to a new hard drive as I am not keen on repurchasing another copy of Windows for a new hard drive. Another issue is that I may not have the original Windows 7 installation CD. Ideally, I want to clone Windows 7 to new hard drive without CD, and without reinstalling everything, not only Windows but also other programs such as MSOffice, Lightroom, etc. How do I go about achieving this?"

Windows 7 Laptop

Why clone Windows 7 OS to new hard drive?

There are many reasons why you might need to clone Windows 7/8/10/11 to a new hard drive.

Make a system backup: cloning Windows 7 to a new hard drive is also an effective way of backing up the operating system, so that you can quickly and easily swap the original hard drive out for the clone when it fails. This helps avoid the need to completely reinstall OS and other software.

Easily upgrade old hard drive: no matter whether you want to upgrade small Windows 7 hard drive to a larger disk, or upgrade to an SSD drive from Windows 7 HDD, cloning a disk can make such an upgrade as easy as possible. 

Get More Storage Space: As you continue to use your Windows 7 computer over time, you may encounter a common hurdle – a full hard drive. Luckily, hard drive cloning allows you to seamlessly transition from a smaller system disk to a more spacious one, all without the hassle of data loss or the need for a fresh OS installation.

Use the customized Windows 7 on another computer: get a new computer and want to use the customized Windows on the old computer? Just clone the Windows 7 system to the new hard drive and install it on the new computer.

In such cases, you will probably want to clone Windows OS onto a new hard drive instead of performing a clean installation.

Best software to clone Windows 7 to a new hard drive

So how can you transfer Windows 7/8/10/11 partition to new hard drive easily instead of reinstalling Windows operating system and other installed applications on this partition? By far, the best way is to use professional disk cloning software like AOMEI Partition Assistant Professional. It is designed for Windows 7/8/8.1/10/11/XP/Vista (32/64-bit) users.

For cloning Windows 7 to new hard drive, it provides 2 methods:
Disk Clone Wizard”: this method can clone the entire system hard disk, including the Windows partition and other data partitions, to the new HDD or SSD drive.
"Migrate OS to SSD Wizard": this way will copy only Windows partition or drive to another hard disk.

No matter which way you choose to transfer Windows 7 from one hard drive to another new hard drive, you can boot from the destination disk successfully afterward. Moreover, you can align SSD partitions after clone if the destination hard drive is an SSD drive, which can further optimize SSD performance. Or schedule defrag HDD to optimize the disk performance when the destination disk is an HDD.

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How to clone Windows 7 to new hard drive step by step?

In this part, we will show you how to migrate/clone Windows OS from one disk to a new hard drive in detail. Before embarking on the cloning process, it is crucial to make a few preparations to ensure a smooth and successful experience. Please review and confirm the following checklist:

Verify sufficient disk space on the new HDD/SSD: Ensure that your target disk has ample capacity to accommodate all the data from the source disk. If necessary, consider deleting any non-essential files to create additional space.
Establish proper connection: Double-check that both the source and target disks are correctly connected to your computer. If you plan to clone to an external hard drive, ensure that it is securely connected to your PC beforehand.
Perform a data backup in advance: It is highly recommended to back up all important files from the source disk to safeguard against any unforeseen data loss during the cloning process. A dependable and trustworthy backup and restore utility, such as AOMEI Backupper, can assist you in efficiently backing up files, disks, systems, and even emails.
Check if the boot mode is compatible: If you are planning to transfer Windows OS from the MBR disk to the GPT disk, make sure your motherboard supports UEFI boot mode since you need to change the boot mode from Legacy BIOS to UEFI after the migration is completed. The vice versa is also true.

By perfectly completing these preparations, you can proceed how to clone a hard drive Windows 7 with the cloning process confidently, knowing that your data is protected and the transition will occur seamlessly.

Option 1. Clone only Windows 7 partition to new hard drive

If you want to only transfer Windows 7 partition to a new hard drive, you can click "Clone" > "Migrate OS" in the main interface.

Step 1. Install and launch AOMEI Partition Assistant Professional. You will get disk partition information as the picture below. Click “Clone” in the top toolbar, and choose “Migrate OS”.

Migrate OS to SSD

Step 2. Choose an unallocated space on the destination disk (SSD or HDD) as you need in the window, and then hit "Next".

Select Space on SSD

Step 3. You could keep the default settings or modify the information (including size, location, and drive letter) of the partition on new disk.

Resize Partition

Step 4. Here is a note about how to boot from the new hard drive then. Click "Finish" after you read it.


Step 5. You will be back to the main interface where changes preview will be displayed. Click "Apply" button to commit the "Pending Operations" in order to execute the migration operation.


Option 2. Clone whole Windows 7 disk to new hard disk

If you want to copy both Windows 7 partition and other data partitions to a new hard drive, just go to "Clone" > "Clone Disk".

Step 1. Click “Clone Disk” in the right menu.

Copy Wizard

Step 2. Choose a method to clone Windows 7 hard disk to new hard drive and click "Next".


①Clone Disk Quickly: clone only used space to the target disk, so the new hard drive can be smaller than the total space of the source disk, but must be larger than its used space. This way allows for cloning larger disk to smaller disk.
②Sector-by-Sector Clone: clone all sectors to the destination disk, no matter whether it is used or not. So the target disk must be larger than the source disk.

Step 3. Choose the original Windows 7 hard disk as the source disk.

Source Disk

Step 4. Then choose the new hard drive as the destination disk. If it is an SSD drive, tick “Optimize the performance of SSD”.

Target One

Step 5. If you select "Clone Disk Quickly" above, you can edit partition size on the destination disk as you want.


Clone without resizing partitions: keep the default partition size on the source disk, and the rest space on the destination disk will turn into unallocated space.
②Fit partitions to entire disk: divide the destination disk into several partitions according to the original partition number and size on the sourced disk.
③Edit partitions on the disk: you can change partition size based on your actual requirements.

Step 6. A boot note will appear as well. Read it carefully and click "Finish".


Step 7. Click "Apply" and then "Proceed" to commit the pending operation.


How do I get Windows 7 recognize my new hard drive?

After cloning Windows 7 to another new hard drive, you need to restart the PC and change the boot order to make the Windows operating system boot from the new SSD drive. How to boot Windows 7 from the new hard drive? Just do as following:

Step 1. Restart your computer and enter the “BIOS” setup.

Step 2. Use the arrow keys to go to the BOOT tab. System devices appear in order of priority.

Step 3. To give the new hard drive boot sequence priority, you can move it to the top of the boot sequence list.

Change Order

Step 4. Save and exit the BIOS setup utility.

 If you are cloning Windows 7 from MBR to GPT, or GPT to MBR, you also need to change boot mode from BIOS to UEFI or UEFI to BIOS.


Can you transfer Windows 7 to another hard drive?

Indeed, it is possible to clone Windows 7 directly to another hard drive If your intention is to upgrade your system disk from an HDD to an SSD, you can achieve this without the need to reinstall Windows or any applications. The key is to perform an OS migration to the SSD, ensuring a seamless transition of your operating system and all associated software.

How do I reinstall Windows 7 on a new hard drive without the disk?

If you want to use Windows 7 on a new hard drive, there's no need to reinstall it from scratch. When utilizing AOMEI Partition Assistant, you are allowed to selectively choose the section you wish to clone. Therefore, you can decide to transfer only OS to the new hard drive instead of running a Windows reinstallation.

Why SSD is not booting after clone Windows 7?

If you encounter an issue where the cloned SSD is unable to boot Windows 7/10, it is possible that an incorrect boot mode is being used on your computer. Keep in mind that the target disk will be unable to utilize the boot mode if your PC does not support UEFI boot mode. In such cases, it is necessary to use the compatible legacy boot mode for MBR drives. By selecting the appropriate boot mode, you can overcome booting issues and ensure a smooth Windows 7/10 experience on your cloned SSD.

Wrap things up

So, with AOMEI Partition Assistant Pro, you can easily clone Windows 7 to new hard drive. Same steps could be applied to transfer Windows 111/10/8/8.1/XP/Vista to SSD/HDD. Most importantly, this functional software comes with many other amazing features like converting boot disk between MBR and GPT styles, recovering lost/deleted partition, enlarging system drive without rebooting computer, splitting a large partition into several smaller one and more.

To move Windows Server to a new hard drive for disk upgrade or replacement, AOMEI Partition Assistant Server can meet your requirements best.

Emily · Staff Editor
Emily is an English editor of AOMEI Technology; she has a great passion for providing easy solutions for people to tackle with all disk or partition management problems. In addition to writing articles about disk/partition management, she also edits great tutorials on how to back up and restore disk for data security. In her spare time, she loves to learn computer skill to improve herself or stay with her family to enjoy a good day.