How to Fix Device Manager Error 39? Easily Explained!

An error pops up on your screen with following text:

“Windows cannot load the device driver for this hardware. The driver may be corrupted or missing. (Code 39)”

As the error indicates a particular driver isn’t functioning due to corrupted or missing components. In this article we’ll illustrate steps to diagnose this problem.

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Alternative manual troubleshooting steps are given below:

Delete Upper & Lower Filters

Error 39 appears when the Upper and Lower Filter Registry entries are misconfigured. Backup the Registry and then delete both the filters.

1. Type “RegEdit” in the Search Box of your Taskbar.


2. This opens up a new window. Locate following sub key:

  • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E965-E325-11CE-BFC1-08002BE10318}

3. Click File | Export, or simply right click the sub key and choose Export option from the context menu.


4. Specify a name for the Registration File, click Save button.


5. Now delete the strings named “Upperfilters” and “Lowerfilters”.

6. Exit the window, reboot your system for the changes to take effects.

Note: In some cases, the sub key named “{4D36E965-E325-11CE-BFC1-08002BE10318}” may not exist on user’s machine. Use the Find box to search for “Upperfilters” and “Lowerfilters” string values. Click Edit, and then Find. Type a search query, click Find Next button.


Remove & Reinstall Faulty USB Controllers

Faulty USB Controllers is a common problem that arises when you don’t safely remove a USB stick. You may also experience this issue when the USB driver files are corrupted or deleted.

1. Press Windows Key + X; choose Control Panel.

2. Click System and Security | Administrative Tools.

3. Double click Computer Management icon.

4. Expand Computer Management (Local) | System Tools | Device Manager.


5. Expand the top node in the right panel, and then “Universal Serial Bus Controllers” node.

6. After expanding, it shows many USB Controllers – Generic USB Hub, Host Controllers, USB Composite Devices, USB Root Hubs, and so on.


7. Just right click, choose Uninstall option for all of them, and then restart your computer/ laptop.

8. The drivers will be automatically installed the next time you start your PC. If not, just right click the top node, choose “Scan for hardware changes”.

Disable Third Party Startup Apps

A problematic startup application causes assortment of issues, including Device Manager error 39. Just disable all Non-Microsoft startup apps, and reboot your PC.

1. Fire up Task Manager. Right click Taskbar; choose Task Manager.

2. Click “More details” link in bottom left.

3. Click Startup tab.

4. Disable each Non-Microsoft startup app. (Right click > Disable)


5. Exit; restart the system.

Update/ Rollback Driver

If you’re encountering Windows 10 error 39 after updating updating a driver, just rollback it to a previous state. On the contrary, if you haven’t updated that particular driver for a while, update it now.

Updating a Driver

1. Open Device Manager.

2. Right click the driver you want to update, choose “Update driver software”.


3. A new wizard appears on your screen. Select the option named “Search automatically for updated driver software”.

Rolling Back a Dirver

1. Open Device Manager.

2. Right click a driver, choose Properties.

3. Click Driver tab, and then “Roll back driver” button.

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