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2-Step Troubleshooting for Installed Windows 10 on A Wrong Hard Drive

Updated on Dec 04, 2018 by Jean to Partition Manager

Accidentally installed Windows 10 on a wrong hard drive! Take it easy. You can change the Windows 10 installation to the correct drive and delete the system on that wrong drive by following this easy guide.

Installed Windows 10 on a Wrong Drive

"My computer has two hard drives and a solid state drive. Windows 8.1 was on the SSD originally. But when I upgraded to Windows 10, it was installed to one of the hard drives but not the SSD. How can I move the installation to the SSD?"

No matter which way you choose to install Windows 10, i.e., clean install and in-house upgrade, you'll be asked to select a location for the whole system installation, and it's quite normal for us to choose the wrong drive when there are multiple hard drives on your computer. How to move Windows 10 from the faulty drive to the correct one then? 

A Two-step Troubleshooting

But before you start, read the below tips to fully understand the goal of each step.

No.1. If you wish to keep the OS on the wrong drive after OS migration, finishing the first step is enough. But if you don't need to keep a dual boot on two separate hard drives, continue performing the second step to obliterate the system on the wrong drive and use it as a data storage drive.

No.2. Important! Both steps for OS migration and OS deletion will erase data on the hard drive. If the data amount for backup is too vast, use third-party free backup software for a fast backup.

Step 1. Migrate OS with EaseUS Partition Master

EaseUS Partition Master is beautifully designed with a powerful feature called "Migrate OS to HDD/SSD", which makes it a specialized OS migration tool that happens to easily solve the problem of installing Windows 10 on a wrong hard drive. All you need to know is that this partition magic software can clone the entire operating system installation from the wrong drive to the correct destination drive.

First. Boot Windows 10 from the wrong hard drive.

Yes, boot your computer in the first place. If the mistake was made using upgrading to Windows 10 from Windows 7/8/8.1, you should change the boot order in BIOS. Generally, continuously hold and press F2 while starting the computer and you will boot in the BIOS interface. Let your computer boot from the wrong hard drive where Windows 10 is installed.

Right after you boot Windows 10 successfully, download and install EaseUS Partition Master on your computer.

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 Windows 10 is supported

Second. Migrate Windows 10 from the wrong drive to the correct drive

Now it's time to take the significant step. Let's assume that the hard disk 1 represents the faulty drive and the hard disk two is for the new system drive you want to switch to. The below operation is going to teach you how to migrate OS from hard disk 1 to hard disk 2. All right, begin.

Note: The operation of migrating OS to SSD or HDD will delete and remove all existing partitions and data on your target disk. If you saved important data there, back up them to an external hard drive in advance.


Step 1: Run EaseUS Partition Master, select "Migrate OS" from the top menu.

select migrate os

Step 2: Select the SSD or HDD as the destination disk and click "Next".

Warning: the data and partitions on the target disk will be deleted. Make sure that you've backed up important data in advance. If not, do it now.

Then click "Migrate" and "OK" to continue.

select the destination disk

Step 3: Preview the layout of your target disk. You can also click the disk layout options to customize the layout of your target disk as you want. Then Click "OK" to continue.

preview the lay out

Step 4: A pending operation of migrating OS to SSD or HDD will be added. Click the "Execute Operation" button and click "Apply" to start migrating your OS to a new disk.

apply the process

Third. Boot Windows 10 from the new hard drive

Use the same way to start your computer, and this time, choose to boot from the new drive (hard disk 2 in the example). That's how super easy it is to rectify the problem of mistakenly installing Windows 10 on a wrong hard drive without doing a fresh install!

Reading recommendation: Migrate OS to SSD or fresh install

Step 2. Delete OS on the Wrong Drive with Easeus Partition Master

Here, one big issue is concerned after the OS migration. You don't delete the previous OS on the wrong hard drive, which means now you got two hard drives and both contain the operating system.

Windows don't allow users to delete operating system directly. To convert a system disk to a simple disk for only data storage, you have to delete the OS off from it. On this regard, go on with EaseUS Partition Master because it offers an easy way to remove system on a second hard drive!

First. Boot your computer from the new drive

We mean the hard disk 2 in the example. You must confirm that your computer is running the operating system on the new hard drive, which means that you changed the boot priority to the hard disk two as we illustrated in the Third step in Step One.

Second. Remove system partition with EaseUS Partition Master

Download Now

 Windows 10 is supported

If you saved important data in the partition which you want to delete, move and save those data to another secure location in advance.

Step 1: Install and launch EaseUS Partition Master on PC

On the main window, right-click on the hard drive partition which you want to delete and select "Delete".

Select parittion to delete

Step 2: Confirm the deletion

Click "OK" to confirm that you want to delete the selected partition.

Confirm to delete partition

Step 3: Execute to delete the partition

Click the "Execute Operation" button at the top corner and keep all changes by clicking "Apply".

Complete the deleting process