If you have ever run the standard Windows "SFC /scannow" command only to be met with the frustrating message "Windows Resource Protection found corrupt files but was unable to fix some of them," SFCFix by niemiro is likely the tool you need.
Developed by a Microsoft Most Valuable Professional (MVP) known as niemiro, SFCFix is an advanced utility designed to automate the repair of complex Windows Update and system file corruptions that standard Microsoft tools often fail to resolve. What is SFCFix? SFCFix is a free, portable utility hosted by the Sysnative forums
. While Windows' native tools (SFC and DISM) primarily rely on a local "component store" to find replacement files, SFCFix uses advanced algorithmic searches and a custom database of file hashes to identify and replace specific corrupted or missing system files. Key Features Automated Analysis: It parses your system's
(Component Based Servicing log) to pinpoint exactly which files are failing to repair. Windows Update Repair:
Specifically targets errors that prevent Windows Updates from installing. Script Integration: sfcfix by niemiro
It allows expert helpers to create custom "fix scripts" (usually as a file) tailored to your specific machine's corruption. No Installation Required: The tool is a standalone executable ( SFCFix.exe ) that doesn't need a traditional installation. How to Use SFCFix
Before running SFCFix, it is highly recommended to run the standard Windows repair commands first, as SFCFix is intended as a "last resort" for errors they can't fix. Step 1: Preliminary Scans (Standard Windows Tools) Command Prompt as an administrator. DISM.exe /Online /Cleanup-image /Restorehealth sfc /scannow
If SFC still reports it cannot fix certain files, proceed to SFCFix. Microsoft Support Step 2: Running Automated SFCFix Get the latest version of SFCFix.exe from Sysnative and save it to your desktop.
Double-click the file. If prompted by User Account Control (UAC), click If you have ever run the standard Windows
Press any key to begin the automated scan. It will analyze your system for approximately 1 minute.
If it finds common corruptions, it will attempt to fix them automatically, which can take 15–30 minutes. Once finished, a log file named SFCFix.txt
will appear on your desktop detailing what was found and fixed. Step 3: Using a Custom Fix Script (Expert Only)
If the automated scan fails, experts on technical forums like Bleeping Computer may provide you with a custom SFCFix.zip Place both SFCFix.exe and the provided SFCFix.zip on your desktop. Drag and Drop: file directly onto the SFCFix.exe Final Steps After Repair Once SFCfix announces success,
The tool will launch and automatically process the specific script designed for your system. Important Safety Warnings
Once SFCfix announces success, do not stop there. Follow this post-repair checklist:
sfc /scannow manually to double-check.SFCfix folder on your C: drive (if left behind) to save space.Microsoft’s built-in SFC tool relies on a local cache located at C:\Windows\System32\dllcache. If this cache itself becomes corrupted—which often happens due to disk errors, abrupt shutdowns, or malware—SFC becomes useless. You might see errors like:
“Windows Resource Protection found corrupt files but was unable to fix some of them.”“The system file repair changes will take effect after the next reboot.” (which never actually fixes the issue)“DISM failed. No operation was performed.”Niemiro developed SFCfix to break this deadlock. The tool forces a repair by cross-referencing your system against a known good source, bypassing the broken local cache entirely.
SFCFix.exe from trusted sources (e.g., Sysnative Forums or Niemiro’s GitHub)..exe in a folder (e.g., C:\SFCFix).