0X0000050C

Fix Windows Error 0X0000050C (ERROR_IMPLEMENTATION_LIMIT)

EP
Erropedia Team
📅 September 13, 2026 📅 Updated Sep 14, 2026 👁 4 views Windows Errors Intermediate
Error 0X0000050C means Windows hit a hardcoded limit on resources. It's most common with endpoint protection and SMB traffic. Here's how to clear it.

Quick answer

ERROR_IMPLEMENTATION_LIMIT (0X0000050C) shows up when a Windows component, driver, or kernel subsystem runs past a limit that Microsoft set in code. The limit itself is intentional. Something on your machine is pushing past it. The fix is almost always finding the driver or process creating the backlog and removing or updating it.

What's actually happening

This isn't a bug in Windows. It's a tripwire. Somewhere in the kernel, a counter hit its ceiling and the operation refused to continue. The counter might be the number of filter drivers attached to a volume, the number of outstanding I/O requests on a network share, or a per-process handle quota inside a third-party driver.

The error text is vague on purpose. Microsoft can't predict what every ISV will do, so they cap the resource and throw 0X0000050C when someone exceeds it. In my experience, three things cause this more than anything else:

  • A broken antivirus or EDR product that stacks too many filter drivers on your file system. I've seen this on Windows 10 22H2 machines running two security tools at once, which is never a good idea.
  • Heavy SMB traffic (backup jobs, Veeam, robocopy of millions of small files) hitting a per-connection limit against Windows Server 2019 or 2022.
  • A misbehaving application opening the same registry key or file handle thousands of times without closing them.

You'll typically see 0X0000050C in Event Viewer under Application or System logs, or in a bluescreen with the same code. A common real-world trigger: someone tries to copy a 2TB folder of CAD files from a NAS to a Windows Server share, and halfway through, Explorer throws "An unexpected error is keeping you from copying the file" with 0X0000050C buried in the details.

Step-by-step fixes

Step 1: Confirm the source

Before you change anything, find out what's generating the error. Open Event Viewer, expand Windows Logs, and look at both Application and System. Filter current log by Event ID 50 or search the description for 0X0000050C.

What you should see: one or more events that name a specific driver file (like mfefirek.sys or eamonm.sys) or a specific network path. Write that name down. You'll need it in the next steps.

Step 2: List all filter drivers on your volumes

Open an elevated Command Prompt (right-click Start, choose Windows Terminal (Admin) or Command Prompt (Admin)). Run this:

fltmc filters

You'll see a table. Each row is a filter driver currently attached to at least one volume. Anything with a non-Microsoft name is a candidate. If you see more than four non-Microsoft filters, that's your problem. Windows has a hard cap on how deep the filter stack can go, and third-party security tools love to add themselves near the top of it.

After running the command, you should see the command return cleanly with a list. If you instead get "The requested operation is not supported" or nothing at all, run fltmc without arguments to verify the tool loaded.

Step 3: Identify duplicate function drivers

Run this in the same elevated prompt:

driverquery /v /fo csv > %userprofile%\Desktop\drivers.csv

Open that CSV in Excel or Notepad. Sort by the Display Name column. Look for anything security-related: antivirus, EDR, DLP, backup agents, encryption tools. If you see two antivirus products (yes, people still install Norton on top of Defender), uninstall one of them. Two real-time scanners on one machine is the number one cause of 0X0000050C I've run into in the last three years.

What you should see: a manageable list. If you've got three or more non-Microsoft security drivers, removing the redundant ones usually clears the error immediately, no reboot needed.

Step 4: Clear the SMB backlog if the error came from a network copy

If the error showed up during a large file transfer over SMB, stop the transfer first. Then run:

net use * /delete /y

That drops every mapped drive. Remap them one at a time. Next, on the machine hosting the share (usually a file server), open an elevated PowerShell window and run:

Get-SmbSession | Format-Table ClientComputerName, NumOpens, Dialect

If you see one client with NumOpens in the tens of thousands, that's the offender. Disconnect that client's session:

Close-SmbSession -ClientComputerName 'WORKSTATION01' -Force

You should see the session drop. The client will need to remap, but the outstanding I/O gets cleared and 0X0000050C stops firing.

Step 5: Reboot and verify

Reboot the machine. This isn't optional. Filter driver changes don't take effect until the kernel reloads. After the reboot, run fltmc filters again and confirm the driver you removed is gone.

After rebooting you should see the filter list is shorter. Open Event Viewer again and check that no new 0X0000050C events have appeared. If the error is gone, you're done.

If the main fix doesn't work

Sometimes the filter driver isn't the problem. Try these in order:

  1. Update the offending driver. Contact the vendor (CrowdStrike, Sophos, Symantec, whoever) and check for a version that specifically addresses 0X0000050C. I've seen this exact code patched out in an EDR update more than once.
  2. Run sfc /scannow and DISM /Online /Cleanup-Image /RestoreHealth. If a Windows system file responsible for capping the resource got corrupted, the limit can get hit earlier than it should. This is rare but cheap to check.
  3. Check for a handle leak. Open Performance Monitor, add the Handle Count counter for the Process object. Watch a specific process over an hour. If it climbs steadily without dropping, that process is leaking handles and will eventually trigger 0X0000050C. Restart it, or better, report it to the vendor.
  4. Roll back a recent Windows update. Some cumulative updates for Windows 10 21H2 and Windows Server 2019 tightened a limit that certain backup tools weren't respecting. Check Settings > Windows Update > Update history, uninstall the most recent cumulative, and test.

Prevention

Don't stack security tools. One real-time antivirus, one EDR if your company requires it, and nothing else touching the file system filter stack. If you manage servers, set a monitoring alert on the fltmc filter count and on SMB session open handles. Catching a runaway process at 5,000 handles is a lot easier than catching it at 50,000 when 0X0000050C starts firing across your whole file share.

And when you see 0X0000050C on a workstation that's under a year old with no weird software, look at the backup agent first. Veeam, Acronis, and Macrium all install filter drivers. Nine times out of ten, that's what pushed you over the edge.

Related Errors in Windows Errors
0XC01E0109 STATUS_GRAPHICS_CANT_EVICT_PINNED_ALLOCATION (0xC01E0109) Fix 0X0000047E ERROR_OLD_WIN_VERSION (0X0000047E): Old Windows fix 0X80280004 TPM_E_AUDITFAILURE (0X80280004) Fix – Auditing Failure 0X80097011 MSSIPOTF_E_FAILED_HINTS_CHECK (0x80097011) — Hints Check Failure
ERROR_IMPLEMENTATION_LIMIT 0X0000050C Windows error 0X50C implementation defined limit Windows filter driver limit antivirus filter driver error SMB implementation limit Windows 10 error code Windows driver stack fltmc filter list Windows Server error registry filter limit network file copy error Windows event log error

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EP
Erropedia Team
Tech Support Editors
The Erropedia editorial team researches and documents real-world tech errors from across Windows, Linux, macOS, networking, databases, cloud platforms, and more. Every solution is reviewed for accuracy and updated as software and systems evolve.