Fixed: Hard Drives Missing After Windows 10 Update

Brithny updated on Sep 23, 2019 to Partition Manager | How-to Articles

Can't See My Hard Drives After Windows 10 Update

"A friend of mine installed Windows 10 yesterday. Now one of his hard drives doesn't show up. What should he do to get the drive to show up without having to format it or doing something that will lose the data on it as he has a lot of important files on that drive before installing Windows 10 on his primary HDD."

If you've recently upgraded to Windows 10, and you couldn't find the hard drive option on This PC (Windows 10 OS) window, you're not alone. Some of you might not even see your hard drives in Device Manager. No need to worry too much about it, it's possible to fix. 

Fix "Partition Disappears in Windows 10 Anniversary Update" Issue

Here are two methods for you to try. You may not have to try them all; work your way down until you find the one works for you. 

Method 1. Reset Drive Letter to Re-enable the Missing HDD

After upgrading Windows 10, you may find that either a primary or the secondary hard disk is not being detected. Luckily, it doesn't mean that the missing drive on the Windows 10 has been lost permanently along with the data stored on it. It is hidden and needs to be re-enabled.

  • Right-Click Windows key at the bottom left corner and select Disk Management.
  • Now you should see the list of hard drives that are connected to your PC/laptop. Pick out the one that is not being detected by the system. It should be indicated as the Unallocated partition.
  • Right-click on it and select Change drive letter and paths.
  • Click on Add to open Add Drive Letter or Path window.
  • Choose Assign the following drive letter and click the letter that to name your drive.
  • Finally, click OK and close all windows.
  • Reboot your PC and navigate to This PC. Check if the drive has been added to the list.

If you think manually fixing this take too much time, you could refer to get the partition letter back with a tool.

Although assigning a drive letter can help us to access the lost partition in File Explorer, this method cannot solve the problem "partition disappeared after installing the Anniversary Update"correctly. If we restart our computer, we will find the drive is missing in File Explorer again, and we have to repeat the process to access it. To solve this, we need to restore lost partition after Windows 10 Update.

Method 2. Restore Lost Partition After Windows 10 Update

No matter how you get your hard drive lost, please don't worry! EaseUS Partition Recovery Wizard, a powerful partition recovery software built in EaseUS's free partition software, can do you a favor to restore lost or deleted partitions with simple clicks.

Download Now

 Windows 10 is supported


Step 1: Launch EaseUS Partition Master on PC

Click on "Partition Recovery" at the top of the main window.

Run EaseUS Partition Master for partition recovery

Step 2: Select a hard disk to search for the lost partition(s)

Choose the hard drive disk or SSD where you lost partitions, and click "Scan".

Run EaseUS Partition Master for partition recovery

Step 3: Wait for the scanning process to complete.

This program will scan the whole disk with two modes - "Quick Scan" and "Deep Scan" to find all lost partitions and data for you.

  • Quick Scan will find your latest or recently deleted partition at a fast speed.
  • Deep Scan will scan and find more and earlier deleted partitions. 
  • If the Quick Scan doesn't find your lost partition, wait patiently till the Deep Scan completes.
Scan lost partitions

During or after the scan, you can double-click the partition marked as "Deleted" to check and view the partition content. If it contains your lost partition data, go to Step 4 and continue. 

Check lost partition contents

Step 4: Select and recover lost partitions

1. Select the lost partition, marked as "Deleted" with previous Labels, capacity etc, and click "Proceed" to continue.
2. Click "Recover Now" to confirm and restore the lost partition.

Scan lost partitions

3. Click the "Execute Operation" button and click "Apply" to restore lost partition.

Scan lost partitions

If Complete search mode also cannot find your lost partition, please try EaseUS free data recovery software to recover your files from the lost partition.


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Frequently Asked Questions

Why Choose EaseUS Partition Master?

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Will the "Migrate OS" feature transfer the Windows system files only or the whole C drive?

To ensure that the migrated system will boot normally, the Migrate OS feature will transfer all the files in the system and the boot partitions. Generally, the boot partition is the C drive so the transfer will include all the files in C.

Does EaseUS Partition Master license apply to multiple computers?

The license of Partition Master Professional and Server editions can be used on 1 computer only, while that for for the Technician and Unlimited editions can be used on multiple machines.

What is the difference between EaseUS Partition Master Trial version and the Free version?

Free is for home users only, with most basic functions available such as partition resize and clone. While trial can help you understand how this product works and test what a full license can do on a business or server OS machine.

Will it cause any data loss after resizing the partition in EaseUS Partition Master?

Generally, it will not cause any data loss or boot issue by resizing a partition. However, in order to protect your data, we suggest that you backup the partition before resizing, in case of any unexpected situations such as power outages, computer hardware failures, etc. You can use EaseUS Todo Backup to backup the partition and its trial version is fully functioned for 30 days.

What should I prepare before resizing the partition?

On the partition that is going to be operated, there might be some files being occupied by other programs. To ensure a successful operation, we suggest that you close all the unnecessary software before resizing that partition. Otherwise, EaseUS Partition Master will detect the partition being locked by the other software and require a reboot to resize the partition under boot mode.

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