What is sfc_os.DLL?
The genuine sfc_os.DLL file is a software component of Microsoft Windows by Microsoft.
Microsoft Windows is an operating system; a piece of software that acts as a bridge between the hardware and software counterparts of a computer. Sfc_os.dll is a resource library that is part of the System File Checker utility which monitors file validity. This is a critical Windows component and should not be disabled or removed.
The Microsoft Windows operating system exhibits a graphical user interface and made its first appearance in November, 1985. It was developed using a GUI system shell for MS-DOS to target the growing market for graphical user interfaces. Microsoft Windows eventually took over the market with a 90% share, taking over large competitors such as Apple. It is currently available in over 137 languages.
Microsoft, founded by Bill Gates and Paul Allen in 1975, is the world's largest software maker with respect to revenue. Microsoft is best known for the Windows operating system. The company quickly rose to fame and fortune following the success of its 1986 public share offering turning three people into billionaires and an estimated 12,000 Microsoft employees into millionaires. Microsoft is headquartered in Redmond, Washington, USA.
sfc_os stands for System File Checker utility for the Windows operating system
Sfc_os.DLL is a Windows DLL file. DLL is the abbreviation for Dynamic Link Library. DLL files are needed by programs or web browser extensions, because they contain program code, data, and resources.
The following information can help you determine if sfc_os.DLL is a Windows system file or if it belongs to an application that you can trust.
Click to Run a Free Scan for sfc_os.DLL related errors
Sfc_os.DLL file information
The process known as Windows File Protection or Ochrana souborù systému Windows or Protection de fichiers Windows belongs to software Microsoft Windows Operating System or Systeme d'exploitation Microsoft Windows by Microsoft (www.microsoft.com).
Description: Sfc_os.DLL is not essential for Windows and will often cause problems. The sfc_os.DLL file is located in the C:\Windows\System32 folder.
Known file sizes on Windows 10/11/7 are 40,960 bytes (79% of all occurrences), 42,496 bytes and 5 more variants. 
A .dll file (Dynamic Link Library) is a special type of Windows program containing functions that other programs can call. This .dll file can be injected to all running processes and can change or manipulate their behavior.
The program has no visible window. There is no detailed description of this service. The file is not a Windows core file. It can change the behavior of other programs or manipulate other programs. Sfc_os.DLL is a Microsoft signed file.
Therefore the technical security rating is 43% dangerous, but you should also take into account the user reviews.
Recommended: Identify sfc_os.DLL related errors
- If sfc_os.DLL is located in the C:\Windows folder, the security rating is 66% dangerous. The file size is 133,120 bytes.
The sfc_os.DLL file is not a Windows core file. The service has no detailed description. It can change the behavior of other programs or manipulate other programs. The program is not visible.
- If sfc_os.DLL is located in a subfolder of C:\Windows, the security rating is 66% dangerous. The file size is 133,120 bytes.
The file is not a Windows system file. There is no detailed description of this service. The program has no visible window. It can change the behavior of other programs or manipulate other programs.
Important: Some malware camouflages itself as sfc_os.DLL. Therefore, you should check the sfc_os.DLL process on your PC to see if it is a threat. We recommend Security Task Manager for verifying your computer's security. This was one of the Top Download Picks of The Washington Post and PC World.
Best practices for resolving sfc_os issues
A clean and tidy computer is the key requirement for avoiding problems with sfc_os. This means running a scan for malware, cleaning your hard drive using 1cleanmgr and 2sfc /scannow, 3uninstalling programs that you no longer need, checking for Autostart programs (using 4msconfig) and enabling Windows' 5Automatic Update. Always remember to perform periodic backups, or at least to set restore points.
Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the 6resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off repairing of your installation or executing the 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.
To get your computer running as fast as it did on day one, you can 8reset your PC. Your personal files will remain intact, but any programs you installed will need to be reinstalled.
To help you analyze the sfc_os.DLL process on your computer, the following programs have proven to be helpful: ASecurity Task Manager displays all running Windows tasks, including embedded hidden processes, such as keyboard and browser monitoring or Autostart entries. A unique security risk rating indicates the likelihood of the process being potential spyware, malware or a Trojan. A good Bantivirus software detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.
Other processes
autopico.exe tuneuputilitiesapp32.exe ezprint.exe sfc_os.DLL armouryswagent.exe fwupdate.exe pmmupdate.exe p508poweragent.exe distnoted.exe soffice.exe powerreg scheduler.exe [all]
Score
User Comments
Warranty
Tingwey Walter
Summary: Average user rating of sfc_os.DLL: based on 4 votes with 2 user comments. One user thinks sfc_os.DLL is essential for Windows or an installed application. 3 users think sfc_os.DLL is dangerous and recommend removing it. 3 users don't grade sfc_os.DLL ("not sure about it").