Error 0x008FA73A cannot be identified safely from the hexadecimal string alone. Microsoft does not currently document it as a named Windows component code, so the first step is to preserve the complete message and where it appeared—such as a blue screen, Windows Update, an installer, Event Viewer, or a particular application—then check the value with Microsoft’s Error Lookup Tool.
Once you know the context, troubleshoot the related failure rather than treating the number as a diagnosis. The sequence below covers crashes and restarts, driver and hardware changes, application errors, update failures, evidence collection, and recovery options for both Windows 11 and Windows 10. You can usually investigate without reinstalling Windows.
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What error 0x008FA73A means—and what it does not prove
A hexadecimal status code is only useful when it is paired with the message and component that produced it. The string 0x008FA73A by itself does not establish that Windows, a driver, a device, or malware is responsible. It may have been generated by a third-party program, an installer, a device service, or a Windows process. A code shown by an application is not automatically a Windows system error.
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Do not infer that the code is a blue-screen stop code, an update error, or a driver error until you have checked the screen or log that reported it. Look for a stop-code name, an application or executable name, a second hyphenated code, an Event Viewer event ID, or a prefix such as 0x8007. Those details determine which repair path is appropriate.
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| Where you saw the code | What to establish first | Likely first action |
|---|---|---|
| Blue screen or automatic restart | Stop-code name, dump creation, and whether a device or driver changed recently | Safe Mode, hardware removal, Device Manager, updates, and crash evidence |
| Windows Update | Update number, cumulative-update history, and whether the failure repeats | Record the complete update message, then use recovery or rollback options if the update caused the restart |
| Application or installer window | Program name, version, installer source, and the exact text around the code | Repair or reinstall that application and inspect its own log before changing Windows drivers |
| Event Viewer | Log name, event ID, provider, timestamp, and the event’s full General and Details tabs | Correlate the event with the crash or installation time; do not treat the hexadecimal value as a stand-alone diagnosis |
Capture the complete error before making changes
Changing drivers, uninstalling software, or resetting Windows can erase useful clues. Preserve the evidence first:
- Photograph the screen or copy the entire message. Include every prefix, suffix, punctuation mark, stop-code name, file name, and application name.
- Write down the exact time and what you were doing: booting, signing in, installing an update, launching a program, connecting a device, or waking from sleep.
- Record recent changes. Note newly installed hardware, a graphics or network driver update, firmware work, a Windows update, a new security product, or an application installation.
- If Windows stayed running, open Event Viewer and check Windows Logs > System and Windows Logs > Application around the recorded time. Save the provider, event ID, and full text.
- If the computer restarted, note whether Windows created a dump file or displayed a percentage counter. Do not delete diagnostic files until you have copied them.
This record lets you distinguish a repeatable Windows failure from a one-time message produced by an application. It also gives a technician enough context to avoid guessing from the code alone.
Decode the hexadecimal value with Microsoft’s Error Lookup Tool
Microsoft describes its Error Lookup Tool this way: “The Microsoft Error Lookup Tool displays the message text that is associated with a hexadecimal status code.” Use the official Microsoft tool locally, enter 0x008FA73A, and compare the returned message with the screen or log that produced the code.
- Open the Error Lookup Tool on a working Windows installation.
- Enter the complete hexadecimal value, including the
0xprefix. If the original message includes another code, look up that code separately as well. - Read the returned status text, but treat it as a clue rather than proof that the tool’s associated component caused your failure.
- Compare the text with the originating application, Event Viewer provider, stop-code name, or installer log. A mismatch is a reason to investigate the originating program, not to force the lookup result to fit.
If the tool returns no useful text, that does not mean the system is irreparable. It may be a private application code, a value assembled by a vendor’s software, or an incomplete value copied from the original message. Continue with the context-specific path below.
Choose the troubleshooting path that matches the symptoms
Use these questions before running repairs. They prevent a driver procedure from being applied to an installer problem, or a recovery reset from being used when Windows still starts normally.
| Question | If the answer is yes | Priority |
|---|---|---|
| Does Windows crash, show a blue screen, or restart? | Use the crash sequence: remove recent hardware, enter Safe Mode, check Device Manager, update Windows and optional drivers, then test hardware. | Highest |
| Did the issue begin after adding hardware or updating a driver? | Disconnect the new device if practical and roll back or reinstall the related driver from the manufacturer’s supported package. | High |
| Does Windows boot normally and only one application show the code? | Repair or reinstall that application, check its logs, and verify the installer or package is intended for your Windows edition. | High |
| Does the problem repeat after Windows updates? | Check update history, install pending updates and optional driver updates, and use System Restore or another recovery option if the update introduced the failure. | Medium |
| Do you have a restore point or recovery medium? | Preserve personal files, then use the least destructive recovery option that matches the evidence. | After diagnostics |
If Windows crashes or restarts
1. Remove newly added hardware
Shut down fully and disconnect a recently added USB device, expansion card, dock, printer, storage device, or other peripheral, leaving only the hardware needed to start Windows. If the crashes stop, reconnect devices one at a time until the trigger returns. For an internal component, follow the computer or motherboard manufacturer’s safe removal instructions; do not open a powered system.
2. Start Windows in Safe Mode
Safe Mode loads a limited set of drivers and services. If the error disappears there, a normal-startup driver, service, or recently installed program becomes more likely than a basic Windows boot failure.
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- In Windows 11, open Settings > System > Recovery. In Windows 10, open Settings > Update & Security > Recovery.
- Under Advanced startup, choose Restart now. Save open work first.
- After the restart, select Troubleshoot > Advanced options > Startup Settings > Restart.
- Press 4 or F4 for Safe Mode, or 5 or F5 for Safe Mode with Networking when you need network access.
If Windows cannot reach Settings, hold Shift while selecting Restart from the sign-in screen’s power menu, or allow Windows Recovery to appear after repeated failed starts. In Safe Mode, remove a recently installed driver or application, and inspect Device Manager before restarting normally.
3. Check Device Manager for marked devices
Open Device Manager and expand categories related to the recent change, such as Display adapters, Network adapters, Sound, video and game controllers, Universal Serial Bus controllers, and storage devices. A warning icon, an unknown device, or a device that disappears when the failure occurs is a useful lead.
- Open the device’s Properties and read the General tab for a status message.
- On the Driver tab, note the provider, date, and version before changing anything.
- If the failure began immediately after an update, use Roll Back Driver when Windows offers it. Otherwise uninstall the problem device only when you know how to reinstall its supported driver.
- Restart and test the same action that previously caused the error. If the device is essential, avoid leaving it disabled as a permanent “fix.”
4. Install Windows and optional driver updates
In Windows Update, install pending quality and feature updates appropriate to your edition. Check the optional updates area for driver updates, especially when the error involves a graphics, audio, network, storage, Bluetooth, or USB device. Restart when prompted and test again. Record the update’s name and date so you can correlate a change with a later crash.
5. Keep sufficient free disk space
Microsoft’s crash guidance recommends keeping approximately 10% to 15% of the system drive free. Windows needs working space for updates, paging, temporary files, and crash dumps. Check the system drive in File Explorer, remove or move files you recognize, and empty temporary locations only after confirming that you do not need their contents. This recommendation is a capacity safeguard; it does not identify the cause of 0x008FA73A.
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1Repair Windows errors before they cause bigger problems2Fix the driver behind crashes, sound loss and screen glitches3Clear out junk files and repair common Windows errors6. Use System Restore when the timeline points to a recent change
If Windows worked before a driver, application, or update was installed, open System Restore from Windows Recovery or search for Create a restore point and choose System Restore. Select a restore point dated before the first failure and review the affected programs and drivers. System Restore changes system files and configuration; it is not a substitute for a current backup of personal files.
If the code appears in an application or installer
When Windows remains stable and only one program displays the message, do not begin with BIOS changes or a system-wide driver sweep. Capture the program name and version, the complete installer or application log, and whether the issue occurs for another Windows user account.
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- Close the program and restart Windows once to rule out a one-time initialization failure.
- Check Settings > Apps > Installed apps (Windows 11) or Settings > Apps > Apps & features (Windows 10). If the program offers Advanced options, use Repair before Reset; Reset can remove the app’s local settings and data.
- If the error occurs during installation, verify that the package matches Windows 10 or 11 and the correct processor architecture, then obtain a fresh copy from the software publisher’s legitimate distribution channel.
- Temporarily remove a recently installed extension or plug-in inside that application, if the program provides such a control.
- Review Event Viewer at the exact failure time. A provider name that belongs to the application is stronger evidence than the hexadecimal code alone.
If several unrelated applications fail and Windows also restarts, return to the crash path: a shared driver, hardware fault, corrupted system state, or malicious software becomes more plausible than one defective application.
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Update BIOS and device firmware carefully
Microsoft’s advanced troubleshooting guidance includes BIOS and firmware updates for recurring crashes. Use only the package intended for the exact computer or motherboard model, keep reliable power connected, and follow the manufacturer’s recovery instructions. A firmware update can correct compatibility problems, but an interrupted or incorrect update can prevent startup; do not perform it merely because the code looks unfamiliar.
Run memory and hardware tests
Use the computer manufacturer’s hardware diagnostics and a memory test when crashes are intermittent, occur under load, or continue in Safe Mode. Windows Memory Diagnostic can be launched by searching for it or by running mdsched.exe; choose the restart-and-check option only after saving work. Test one change at a time and record any reported error. A failing memory module, storage device, power supply, or motherboard can produce changing codes, so a different hexadecimal value on each crash does not rule hardware out.
Check for malware
Run a scan with your installed security software and follow its quarantine instructions. Malware is one possible cause of instability, but the presence of 0x008FA73A is not evidence that the computer is infected. Keep the scan result with the rest of your timeline.
Review dumps and event logs
For blue-screen events, preserve any minidump or memory-dump files before cleanup utilities remove them. In Event Viewer, compare the timestamps of the crash, device resets, disk warnings, and update installations. A recurring provider or driver file is a stronger lead than a single generic restart event.
Use Driver Verifier only with a controlled plan
Driver Verifier can stress drivers to expose faults, but Microsoft warns that checking every driver indiscriminately can reduce performance and make a system unusable. Do not enable it as a first-line fix or select all drivers without a recovery plan. If a qualified technician directs its use, target only suspected third-party drivers, create a restore point first, and know how to return to Safe Mode and disable the verification settings if booting fails.
Recovery options when normal repair does not work
Recovery should follow evidence collection, not replace it. Copy personal files to another location while Windows still starts, or use a separate computer and storage device if the affected system is unstable.
Use a restore point or Windows Recovery Environment
From Troubleshoot > Advanced options, choose the least destructive option that matches the timeline, such as System Restore or Startup Repair. Read the prompts carefully; some options remove applications or change system settings. If BitLocker is enabled, Windows may request the recovery key.
Prepare a bootable Windows recovery USB drive
A bootable Windows recovery USB drive can provide access to repair tools when the internal installation will not start. Use a blank drive with enough capacity for the recovery media, create it with Microsoft’s official media or recovery process, and verify that it matches the affected Windows edition and firmware mode. The drive is a recovery medium, not a guarantee that an unidentified code will be repaired. Keep it available before a future failure and test that the computer can boot from USB without altering the internal disk.
Reset or reinstall only after backups
If diagnostics and recovery tools cannot restore a stable system, review Windows reset choices and understand whether each option keeps or removes personal files and applications. A clean installation is the last resort for this unidentified code, because reinstalling can erase evidence and will not correct defective hardware or a failing peripheral.
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What Microsoft’s crash figures suggest about priorities
Microsoft’s 2025 guidance page attributes its analyzed crashes as follows:
| Attributed cause | Share of analyzed crashes | How to use that information |
|---|---|---|
| Third-party driver code | 70% | Prioritize recent hardware and driver changes, Safe Mode, Device Manager, and controlled driver rollback or update. |
| Hardware issues | 10% | Run memory and hardware diagnostics and check firmware when software steps do not explain the failure. |
| Microsoft code | 5% | Keep Windows updated and preserve dumps and event details for a support case. |
| Unknown because memory was too corrupted to analyze | 15% | Do not overinterpret one code; collect several crash records and test hardware if the pattern continues. |
These percentages describe Microsoft’s analyzed crash population, not a measurement of error 0x008FA73A specifically. They are useful for ordering diagnostic work, not for assigning a cause to your computer.
A practical stop-and-check list
- Have you saved the exact message, stop-code name, application, Event Viewer ID, and timestamp?
- Did Microsoft’s Error Lookup Tool return text, and does that text match the component that displayed the code?
- Can Windows boot normally, or does it crash before sign-in?
- What changed immediately before the first failure: hardware, driver, firmware, update, or application?
- Did Safe Mode change the symptom?
- Does Device Manager show a warning or an unknown device?
- Are Windows and optional driver updates installed, and is roughly 10% to 15% of the system drive free?
- Have you run appropriate memory, hardware, and malware checks while preserving dumps and logs?
- Do you have a recent backup, restore point, and recovery medium before attempting reset or reinstall?
If the code appears only once and does not return after the related update or application action, keep the captured evidence but avoid unnecessary system changes. If it recurs, the combination of context, timestamps, Safe Mode behavior, device status, and test results is more valuable than the hexadecimal string alone.
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