My desktop Quit showing my external drive letter in win explorer.

Question

My desktop computer quit showing the drive letter for my external drive and any sd thumb drives on any usb port. The drives all work on a different computer and now no drives show in Wim explorer on the USB ports on the desktop. They all worked earlier today.

Answer 1

Hi Victor Najjar,

I can imagine how frustrating it is when the drive clearly works recently yet suddenly disappears from File Explorer. I know you’ve already tried a lot of things, but it’d be very helpful if you can do a quick confirmation test:

• In File Explorer’s address bar, manually type the drive letter (e.g. E:\)
• If it doesn’t open, it might be logical/file‑system/mount‑state failure
• If it does, that confirms it’s purely an Explorer / shell visibility issue.

1 - Check if File Explorer is hiding removable drives

• Open File Explorer > on the top menu, click three-dot > Options
• Open View tab > Make sure Hide empty drives is unchecked
• Select OK, then close the window and reopen File Explorer.

2 - Restart Windows Explorer

• Press Ctrl + Shift + Esc to open Task Manager
• Find Windows Explorer > right‑click > Restart

3 - Check for a policy that hides drives from Explorer

• Press Win + R > type regedit > press Enter to open Registry Editor
• Go to: HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer
• If NoViewDrives or NoDrives or similar entry exists, delete them > Restart your PC.

Disclaimer: Generally, modifying registry is intended for advanced users, administrators, and IT Professionals. It can help fix some problems, however, serious ones might occur if you do it incorrectly. Therefore, make sure that you follow these steps carefully. For further protection, first check out How to back up and restore the registry in Windows - Microsoft Support

4 - Reinstallation repair (keeping files and apps)

• Use built-in repair option
  • Open Settings > System > Recovery > Fix problems using Windows Update
  • Click Reinstall now > follow the onscreen instructions to reinstall Windows.
• Perform an in-place upgrade:
  • Refer to Reinstall Windows with the installation media - Microsoft Support
  • Navigate to the bottom of the page and expand In-place Upgrade.  
  • You can also check out the instructions from one of the Moderators here: How to run In-place upgrade in Windows 11 - Microsoft Q&A

Disclaimer: Both Windows reinstallation and in-place upgrade will refresh your Windows files and operating system without removing files or applications. That being said, we always recommend that if you have important data, you should back it up first before making large system changes.

I know that’s not ideal, but I hope this can rebuild your File Explorer, shell policies, and removable‑storage handling without wiping data.

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Answer 2

Hi Victor,

Thank you for posting your question here!

This usually means Windows lost the drive mapping or the USB service glitched. Kindly try these:

Step 1 Disk Management Press Windows key + X then Disk Management If the USB drive shows without a letter right click it and assign one

Step 2 USB reset Shut the PC down Unplug the power cable Hold the power button for 15 seconds Plug back in and start the PC

Step 3 Device Manager Press Windows key X + Device Manager Expand Universal Serial Bus controllers If USB Mass Storage shows a warning uninstall it Restart the PC

Step 4 Services check Press Windows key + R type services.msc

Make sure Virtual Disk and Plug and Play are running and set to Automatic

Step 5 Isolation test Sign in with a different Windows user if possible If USB works there the issue is profile related

Let me know if you need further assistance, feel free to ask me by clicking "Add Comment" or "Add Answer" if you cannot add comment so your response will be visible. Thank you and I appreciate your effort.

Best Regards,

Angelique P.

Answer 3

On the affected desktop, try these steps in order:

1. In File Explorer, press F5 while viewing This PC to refresh the drive list. There is a known issue where Explorer does not correctly refresh removable drives after power‑state changes; F5 forces it to update.
2. If the drives still do not appear, use Device Manager to reset the USB controllers:
   1. Press Windows + R, type devmgmt.msc, and select OK.
   2. Expand Universal Serial Bus controllers.
   3. For each entry under Universal Serial Bus controllers, right‑click and select Uninstall.
   4. After all USB controllers are uninstalled, restart the computer.
   5. Windows will automatically reinstall the USB controllers. Reconnect the external drive and SD/thumb drives and check File Explorer again.
3. If USB ports still intermittently stop working after reconnecting devices, consider disabling USB Selective Suspend as a workaround (advanced step, affects power saving and involves registry editing). This is only recommended if USB devices repeatedly become unresponsive and other methods do not help. The documented workaround explains that a race condition in the Selective Suspend feature can leave USB devices unresponsive. Disabling it prevents Windows from suspending USB devices for power saving, which can restore reliability at the cost of higher power usage.

If, after these steps, the drives still do not appear in File Explorer but are visible from Command Prompt (for example, using dir on the expected drive letter), continue using F5 to refresh Explorer when connecting or resuming from sleep/hibernate, as this is a known Explorer refresh issue.

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References:

• USB disk drive letter is not displayed after a computer resumes from hibernation
• USB port may stop working after you remove or insert a USB device
• USB devices that are connected to a computer may not work after the computer is idle for more than one hour Windows 7 or in Windows Server 2008 R2