Microsoft Windows Error Code 0xC0000047: How to Fix It

Easy 30-60 minutes Medium Severity Verified June 2026
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Error Code
0xC0000047
Brand
Microsoft Windows
Product Type
operating_system
Severity
Medium
DIY Difficulty
Easy
Estimated Fix Time
30-60 minutes
Error code 0xC0000047 indicates that your Windows system has exceeded the semaphore limit, which is a resource used by programs to coordinate access to shared resources. This usually happens when too many programs or services are waiting for a resource, often due to a software bug or system overload.
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Tools You'll Need

How to Fix Error Code 0xC0000047

  1. Restart Your Computer

  2. Run System File Checker (SFC) Scan

    Do not close Command Prompt during the scan.

  3. Check for Windows Updates

  4. Perform a Clean Boot

    After troubleshooting, reverse the changes to restore normal startup.

  5. Update or Roll Back Problematic Drivers

    Be cautious when rolling back drivers; only do so if you suspect a recent update caused the error.
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When to Call a Professional

If none of the steps resolve the error, the issue may be deeper, such as malware, failing hardware, or severe system corruption. Consider contacting a professional IT technician or Microsoft Support.

Frequently Asked Questions

What does error code 0xC0000047 mean?
It means the system reached the maximum number of semaphores (a type of lock used by programs) allowed, causing a resource conflict.
Can this error be caused by malware?
Yes, malware can create excessive system calls that exhaust semaphore limits. A full antivirus scan is recommended if other fixes fail.
Does this error occur on Windows 10 or 11?
Yes, it can occur on any modern Windows version, including Windows 10 and 11.
Will a factory reset fix error 0xC0000047?
A factory reset or clean Windows reinstall can resolve persistent software issues, but try the less drastic steps first.
Is there a way to increase the semaphore limit?
No, the semaphore limit is hard-coded in Windows. The only fix is to reduce usage or fix the underlying cause.

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