What Is sfc_os.dll? Is It A Virus Or Malware? 

 July 11, 2021

What is sfc_os.dll?

sfc_os.dll is an dll file which belongs to the process Windows File Protection which comes with the Software Ochrana souborù systému Windows developed by software developer Microsoft Windows Operating System

The .dll extension of the sfc_os.dll file specifies that it is a Dynamic-link library file.

Malware and viruses are also transmitted through dll files. So we must be sure before opening any unknown dll file on our computers.

We will check if the sfc_os.dll file is a virus or malware? Whether it should be deleted to keep your computer safe? Read more below.

Is sfc_os.dll safe to run? Is it a virus or malware?

Let’s check the location of this dll file to determine whether this is a legit software or a virus. The location of this file is

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File Location / Danger rating : 44% dangerous

To check whether the dll file is legit you can start the Task Manager. Then click on the columns field and add Verified Signer as one of the columns.

Now look at the Verified Signer value for sfc_os.dll process if it says “Unable to verify” then the file may be a virus.

File Namesfc_os.dll
Software DeveloperMicrosoft Windows Operating System
File Type
File Location44% dangerous
SoftwareOchrana souborù systému Windows


sfc_os.dll is a Virus or Not : sfc_os.dll is not a Virus

If the developer of the software is legitimate then it is not a virus or malware. If the developer is not listed or seems suspicious you can remove it using the uninstall program.

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How to Fix sfc_os.dll Errors

To fix missing sfc_os.dll file you can perform a system restore to restore all missing dll files on your system.

If the system restore didn’t fix the dll issue then you can run System File Checker to fix corrupt dll files on your Windows system.

How To Remove or Uninstall sfc_os.dll

To remove sfc_os.dll from your computer do the following steps one by one.

  1. If the dll file is a part of a software program or game then it will also have an uninstall option. Then you can run the uninstaller located at directory like C:>Microsoft Windows Operating System>Windows File Protection orOchrana souborù systému Windows >sfc_os.dll_uninstall.dll
  2. Or the sfc_os.dll was installed using the Windows Installer then to uninstall it Go to System Settings and open Add Or Remove Programs Option.
  3. Then Search for sfc_os.dll or the software name Ochrana souborù systému Windows in the search bar or try out the developer name Microsoft Windows Operating System.
  4. Then click on it and select the Uninstall Program option to remove sfc_os.dll file from your computer. Now the software Ochrana souborù systému Windows program along with the file sfc_os.dll will be removed from your computer.
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I hope you were able to learn more about the sfc_os.dll file and how to remove it.

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Let us know in the comments below if you face any other sfc_os.dll issues.

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