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There is no verified, universal fix for 0x016055D9. Available Microsoft guidance does not define this hexadecimal value, and it has not been established as a Windows Update error, Device Manager code, or blue-screen stop code. The correct repair depends on where it appears and what you were doing. Identify the app or device, capture the complete message, and then follow the matching Windows 11 or Windows 10 path below. Do not buy a driver utility, replace hardware, or run a generic “repair” download based on this code alone.
What does error 0x016055D9 mean?
At present, Microsoft’s published Windows Update, Device Manager, and stop-error material does not document 0x016055D9 (also seen as 016055D9 or 0x16055D9). That means the number by itself cannot identify the failing component. It may be generated by a particular application, installer, device driver, service, or crash reporter rather than by Windows itself.
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Where does the code appear, and what were you doing?
Start by recording the context before changing anything. The answer determines which troubleshooting branch is appropriate.
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| Where you see it | What to record | Use this branch |
|---|---|---|
| Windows Update or an upgrade screen | Update name or KB number, percentage, and whether the restart failed | Windows Update troubleshooter and component repair |
| Device Manager | Device name, manufacturer and model, Properties > General status text, and driver version | Device-specific diagnosis and vendor support |
| Blue screen or automatic restart | Complete stop-code text, any named .sys driver, and a minidump if available |
Stop-error troubleshooting |
| A single application, game, or installer | Program name and version, action that triggered the message, and the full dialog text | Application repair, update, or publisher support |
| File Explorer, a service, or an unknown pop-up | Executable or DLL name, file location, and event time | Check the responsible service or software before system changes |
Collect evidence safely
- Take a screenshot that includes the complete message and window title. Remove names, email addresses, product keys, and other personal information before sharing it.
- Write down whether Windows still starts, whether the problem began after a Windows update, driver change, or application installation, and whether it happens every time.
- Open Event Viewer only to read corroborating entries: press
Win, type Event Viewer, then check Windows Logs > Application or System around the recorded time. Note the source and event ID; do not delete logs while diagnosing. - If the message names a file, copy its exact name and path. Do not download a replacement DLL from an unofficial site.
How do I fix it when it appears during Windows Update?
Use this section only when the code is shown while Windows is downloading, installing, or rolling back an update. These are general Microsoft procedures; they are not a confirmed remedy for 0x016055D9.
Run the Windows Update troubleshooter
- Windows 11: open the Get Help app and search for the Windows Update troubleshooter, or go to Settings > System > Troubleshoot > Other troubleshooters > Windows Update > Run.
- Windows 10: use the Get Help troubleshooter, or open Settings > Update & Security > Troubleshoot > Additional troubleshooters > Windows Update > Run the troubleshooter.
- Apply the suggested corrections, restart the computer, and select Settings > Windows Update > Check for updates (or Update & Security > Windows Update on Windows 10).
Microsoft’s Windows 10 troubleshooting page notes that Windows 10 support ended on October 14, 2025. A device can still run Windows 10, but update availability and assistance differ from Windows 11.
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If the troubleshooter does not resolve an update failure, Microsoft’s general guidance is to repair the component store and then check protected files. These commands require an elevated Command Prompt and can take time.
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- Open Start, type
cmd, right-click Command Prompt, and choose Run as administrator. - Run
DISM.exe /Online /Cleanup-image /Restorehealthand wait for it to finish. Keep the window open even if progress pauses. - Run
sfc /scannowafter DISM completes. Allow System File Checker to reach 100 percent. - Restart Windows and try the update again. Record any new message verbatim; a changed error can identify the next component.
Neither command is documented as targeting 0x016055D9 specifically. If DISM or SFC reports that it could not repair files, preserve the exact result and use Microsoft Support or your organization’s administrator rather than repeating commands indefinitely.
What should I do if Device Manager shows the code?
Do not assume every numeric message in Device Manager has a Microsoft-defined meaning. Microsoft states that its Device Manager code list is not exhaustive and directs users with an unlisted code to the hardware manufacturer or Microsoft Support.
- Press
Win + Xand select Device Manager. - Expand the category containing the warning icon, right-click the device, and choose Properties.
- On General, copy the complete Device status text. On Details, select Hardware Ids and record the first value if the vendor requests it.
- Open the Driver tab and record the provider, date, and version. Do not uninstall or roll back a driver until you know which device it controls and have a recovery option.
- Search the device manufacturer’s support page using the exact model and Windows edition. Install only a driver supplied for that model, or ask the manufacturer whether the unlisted code is known.
If the device disappeared after a recent driver change, use Driver > Roll Back Driver when that button is available. If Windows cannot start normally after a driver change, use Windows Recovery Environment and Safe Mode to undo the change, then contact the hardware vendor if the warning returns.
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How do I handle a blue screen or repeated crash?
Use Microsoft’s stop-code troubleshooting guidance only when the message is genuinely a blue screen or crash screen. The available material does not establish that 0x016055D9 itself is a stop code.
- Photograph the entire screen, including any stop-code name and percentage, before the computer restarts.
- Note whether a driver file such as
something.sysis named. That filename, not the hexadecimal value alone, is the useful lead. - Disconnect newly added peripherals and undo the most recent driver or software change if you can do so safely.
- Start Windows in Safe Mode if normal startup repeatedly crashes. If Safe Mode is stable, remove or update the recently changed software through its publisher or hardware vendor.
- Check Settings > System > About (Windows 11) or Settings > System > About (Windows 10) to confirm the edition and build when requesting support.
Keep any minidump files and reliability history entries for the technician. Do not edit the registry or delete system drivers merely because their names appear near the crash time.
What if an application or installer displays 0x016055D9?
When only one program shows the message and Windows otherwise works, treat it as that program’s error until its publisher says otherwise.
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- Update the application from its official publisher channel and install the latest Windows updates that your edition supports.
- Use Settings > Apps > Installed apps (Windows 11) or Settings > Apps > Apps & features (Windows 10) to select the program. If Advanced options > Repair or Reset is offered, read the warning about stored data before choosing it.
- If the program has its own repair or uninstall tool, follow the publisher’s instructions and reboot before reinstalling.
- Send the publisher the exact code, full message, app version, Windows build, and a sanitized screenshot. Ask whether the code is specific to that release.
A clean reinstall can remove a damaged application configuration, but it will not prove that Windows itself caused the code. Back up the program’s documents and settings first.
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What should I do if Windows will not start?
If the code appears before the desktop loads, use the least destructive recovery option first.
- Interrupt startup twice by holding the power button only if Windows is already stuck; on the next boot, allow Windows Recovery Environment to open.
- Choose Troubleshoot > Advanced options > Startup Repair. If the issue began after a driver or update, try Uninstall Updates or Startup Settings > Safe Mode.
- If you have a restore point from before the change, System Restore can roll back system state without intentionally deleting personal files, but review the programs and drivers it plans to affect.
- After Windows starts, return to the branch that matches the original source of the code and collect the evidence requested there.
Back up important files before using a reset or reinstall. A reset is a last resort when the originating software or device cannot be repaired and you have confirmed that the code is not coming from a recoverable application problem.
Which fix should I try first?
Choose the smallest, reversible action that matches the source you confirmed.
| Situation | First action | Escalate when |
|---|---|---|
| Windows Update screen | Run the Windows Update troubleshooter, restart, and check again | DISM/SFC fail or the same update repeatedly rolls back |
| Unlisted Device Manager message | Record device and driver details and contact the hardware vendor | The vendor cannot identify the code or hardware remains unstable |
| Blue screen | Capture the stop text and named driver, then use Safe Mode if needed | Crashes continue without a clear recent change |
| One application | Repair or update that application using its publisher’s channel | Reinstallation fails or other programs begin crashing |
What should I avoid while troubleshooting?
- Do not label the message a virus, Windows Update failure, driver failure, or blue-screen code until its location confirms that context.
- Do not install a random DLL, registry cleaner, “instant fix,” or unsigned driver offered by a download site.
- Do not replace a graphics card, printer, adapter, or other component solely because this number appeared.
- Do not repeatedly run repair commands without recording their output; a new error message is often more informative.
- Do not share screenshots containing activation keys, email addresses, serial numbers, or personal filenames.
When should I contact Microsoft or the software or hardware vendor?
Escalate when the code remains after the context-specific steps, when Windows cannot boot, or when the failure affects data or business-critical work. Provide the exact message, screenshot, Windows edition and build, app or device model, driver or app version, time of failure, recent changes, and results of each command or troubleshooter. For an unlisted Device Manager code, Microsoft specifically recommends the device vendor or Microsoft Support; the application publisher is the correct first contact when only one program generates the dialog.
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Frequently Asked Questions
Can this code reveal which Windows component is broken?
No. The hexadecimal value has no documented component mapping in the available Microsoft material. The window, app, device, stop-code text, or event source that produced it is needed to narrow the cause.
Should I reinstall Windows immediately after seeing 0x016055D9?
Usually not. Reinstallation can erase applications, settings, and possibly files while leaving an application- or hardware-specific fault unresolved, so identify the source and preserve data first.
How can I share a screenshot without exposing private information?
Crop the image to the error window and remove account names, email addresses, product keys, serial numbers, and full file paths. Include the title bar and complete message because those details identify the originating program.
Does Windows 10 still receive normal updates for this problem?
Microsoft ended Windows 10 support on October 14, 2025. Your edition may still operate, but update availability and support options differ from Windows 11, so verify the policy for your specific edition.
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