Best Free Software to Transfer Windows 10/8/7 OS to SSD without Reinstalling

January 31, 2019

Want to transfer Windows OS from HDD to SSD without clean install? Actually, AOMEI Partition Assistant makes it quite easy to migrate Windows 10/8/7 OS and programs to new SSD.

Why Transfer OS to SSD?

In general, bad performance or hard drive failure is likely become the main factor of replacing old hard drive with a new one. SSD like Samsung EVO or Intel 600P has known-to-all advantages comparing to HDD, more durable, faster read & write speed, shorter boot time, low noise, less power consumption, better shock-resistant, etc. So it is quite common to use SSD for OS and HDD for storage combination during daily computing. If your computer supports installing two drives simultaneously, just transfer OS to SSD from HDD.

User who has installed OS on SSD may also want to transfer OS from one SSD to another. Considering more and more applications are installed on SSD and benefit from SSD, it is necessary to move OS drive to a larger SSD. What’s more, SSDs’ prices are come with more affordable nowadays. Therefore, SSD to SSD migration becomes a normal behavior.

From another perspective of view, system migration keeps all data intact and saves time and effort when it compares to fresh install. As long as the new SSD is large enough to fit all content of the system partition, and some system related partitions in some cases, steps are fairly easy. If plan to migrate OS to smaller SSD that may not have enough space available, you’d better move personal files to another place out of system drive to reduce the total size.

Best Free Software to Migrate OS to SSD

When it comes to migrating system to another drive, finding reliable software to assist you is a wise move. AOMEI Partition Assistant Standard has “Migrate OS to SSD” feature especially designed for this kind of task, which will transfer OS and programs to SSD entirely. 

It also enables successful boot in a large extent. “Copy Disk Wizard” can help you clone entire hard drive to SSD if the need ever arises. This free partition manager has easy-to-use wizard and works well under Windows 10, Windows 8, Windows 7, Windows XP and Windows Vista. Download it and have a try.

How to Transfer Windows 10 OS to SSD without Reinstalling Windows?

In the first place, connect the new SSD to your machine (install it on desktop and connect via USB-to-SATA cable on laptop). Make sure the SSD has been detected by Windows. After migration, a screwdriver is necessary during the progress of swapping out old drive. You may want to backup important data before you start. See the example below.

Steps to transfer OS from HDD to SSD on laptop

Step 1: install and run AOMEI Partition Assistant. Click on “Migrate OS to SSD” and read the introduction.

Migrare OS to SSD

Step 2: select the SSD as the destination location. If there is partition(s) on SSD, check “I want to delete all partitions on the disk 2 to migrate system to the disk” and make “Next” available.

Select Disk Space

Step 3: you’re allowed to resize system partition on new drive, drive letter is also included.

Resize Partition

Step 4: keep the “Note” in mind because you may need it later.


Step 5: click “Apply” > “Proceed” to execute the pending operation.


Step 6: turn off the computer and remove the cloned SSD. Release the back cover of the laptop and replace old hard drive with the cloned SSD using screwdriver. Finally, boot from the new SSD.


  • If doing this on desktop, you may skip “Step 6” and change boot priority to SSD in BIOS.

  • A reboot is required in OS migration.

  • The Standard edition of AOMEI Partition Assistant supports only migrate OS from MBR disk to MBR disk. If use GPT partition style on the hard drive, you need to convert GPT to MBR first or upgrade to Professional edition and try again.

Format old system drive after migrating to SSD

After transferring OS to SSD, the old hard drive still has OS partition. If you want to format the system drive and use it as a secondary storage, you can also turn to AOMEI Partition Assistant Standard. “Format Partition” feature will help you a lot. On desktop, boot from SSD and reformat the hard drive including system partition directly. On laptop that usually has one disk bay, you need to make bootable media first and format the system drive under WinPE environment. Refer to following steps for detail.

Make Bootable Media

1. Insert a USB drive (or CD/DVD) to your computer. Run AOMEI Partition Assistant and click on “Make Bootable Media”.

2. Select USB flash drive and click “Proceed”. All data on USB drive will be overwritten. Please backup important data beforehand.

3. Wait for the progress to be completed and click “Finish”.

4. Turn off the laptop, install the old hard drive back and boot from USB stick (change boot order in BIOS). AOMEI Partition Assistant will run automatically after login. Just format the system partition as usual.

Note: The hard drive will not be able to boot after formatting.

Possible Reasons for Cloned SSD Won’t Boot

In most cases, the cloned SSD will be able to boot successfully. However, when the SSD won’t boot, there might be something wrong somewhere. For example, your boot mode has a wrong partition table. Specifically, MBR partition style boot from BIOS and GPT disk needs UEFI mode enabled. Change partition style if necessary.

If receive “Operating system not found” or “Missing operating system” when trying to boot, you may have an invalid MBR table. MBR is the significant data structure containing the partition table for SSD drive and a small amount of executable code for the boot start. A valid MBR enables successful booting. You can fix MBR on SSD using AOMEI Partition Assistant in the created bootable USB drive.


Transfer OS to SSD in Windows is actually quite simple if you find the right tool. If have made regular backups for operating system, you can just perform system restore using the image and realize OS migration to new SSD. To be honest, AOMEI Partition Assistant is a great partition tool and becomes more and more powerful. New feature “Integrate to Recovery Environment” has added to this software that allows you to set recovery environment to your hard drive. Why don’t you download to discover more?