FACTOID # 21: 15% of Army recruits from South Dakota are Native American, which is roughly the same percentage for female Army recruits in the state.
 
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Encyclopedia > System File Checker
System File Checker

Developer: Microsoft
OS: Microsoft Windows
Use: System software
License: MS-EULA
Website: Microsoft SFC Documentation

System File Checker is a utility in Microsoft Windows that allows users to scan for and restore corruptions in Windows system files. This utility is available on Windows 98, Windows 2000, Windows XP, Windows Server 2003, Windows Vista and Windows Server 2008, although in the Windows NT family of operating systems, it scans files using Windows File Protection. Image File history File links Size of this preview: 800 × 423 pixelsFull resolution (829 × 438 pixel, file size: 27 KB, MIME type: image/png) This is a screenshot of System File Checker on Windows XP. author: Me (voidvector) File history Legend: (cur) = this is the current file, (del) = delete this... Software development is the translation of a user need or marketing goal into a software product. ... Microsoft Corporation, (NASDAQ: MSFT, HKSE: 4338) is a multinational computer technology corporation with global annual revenue of US$44. ... An operating system (OS) is a set of computer programs that manage the hardware and software resources of a computer. ... Microsoft Windows is the name of several families of proprietary software operating systems by Microsoft. ... System software is a generic term referring to any computer software that is an essential part of the computer system. ... A software license is a legal agreement which may take the form of a proprietary or gratuitous license as well as a memorandum of contract between a producer and a user of computer software. ... Microsoft Corporation, (NASDAQ: MSFT, HKSE: 4338) is a multinational computer technology corporation with global annual revenue of US$44. ... A software license is a type of proprietary or gratiuitious license as well as a memorandum of contract between a producer and a user of computer software — sometimes called an End User License Agreement (EULA) — that specifies the perimeters of the permission granted by the owner to the... A Web site (or colloquially, Website) is a collection of Web pages, images, videos and other digital assets that is hosted on a Web server, usually accessible via the Internet or a LAN. A Web page is a document, typically written in HTML, that is almost always accessible via HTTP... Microsoft Windows is the name of several families of proprietary software operating systems by Microsoft. ... Windows 98 (codenamed Memphis) is a graphical operating system released on June 25, 1998 by Microsoft and the successor to Windows 95. ... Windows 2000 (also referred to as Win2K) is a preemptible, interruptible, graphical and business-oriented operating system that was designed to work with either uniprocessor or symmetric multi-processor 32-bit Intel x86 computers. ... Windows XP is a line of proprietary operating systems developed by Microsoft for use on general-purpose computer systems, including home and business desktops, notebook computers, and media centers. ... Windows Server 2003 is a server operating system produced by Microsoft. ... Windows Vista is a line of graphical operating systems used on personal computers, including home and business desktops, notebook computers, Tablet PCs, and media centers. ... Windows Server Longhorn is the codename for the next server operating system from Microsoft. ... Windows File Protection (WFP) is a technology included in all Microsoft Windows operating systems beginning with Windows 2000 to prevent programs from replacing critical Windows system files. ...

Contents

History

Due to problems with Windows applications being able to overwrite system files in Windows 95, Microsoft has since implemented a number of security measures to protect system files from malicious attacks, corruptions, or problems such as DLL hell. Windows 95 is a consumer-oriented graphical user interface-based operating system. ... DLL hell is a colorful term given to any problem based on a difficulty in managing Dynamically Linked Libraries (DLLs) installed on a particular copy of an operating system. ...

SFC on Windows 98
SFC on Windows 98

System File Checker was first introduced on Windows 98 as a GUI utility. It offered scanning and restoration of corrupted system files by matching the version number against a database containing the original version number of the files in a fresh Windows 98 installation. This method of file protection was basic. It determined system files by file extension and file path. It was able to restore files from the installation media or a source specified by the user. Windows 98 did not offer real-time system file protection beyond file attributes; therefore, no preventive or reactive measure was available. Image File history File links No higher resolution available. ... Image File history File links No higher resolution available. ... Windows 98 (codenamed Memphis) is a graphical operating system released on June 25, 1998 by Microsoft and the successor to Windows 95. ... A filename extension or filename suffix is an extra set of (usually) alphanumeric characters that is appended to the end of a filename to allow computer users (as well as various pieces of software on the computer system) to quickly determine the type of data stored in the file. ... A path is the general form of a file or directory name, giving a files name and its unique location in a file system. ... A file attribute is a piece of data that describes or is associated with a computer file. ...


All Windows NT-based operating systems since Windows 2000 introduced real-time file protection, called Windows File Protection (WFP). [1]. Windows 2000 (also referred to as Win2K) is a preemptible, interruptible, graphical and business-oriented operating system that was designed to work with either uniprocessor or symmetric multi-processor 32-bit Intel x86 computers. ... Windows File Protection (WFP) is a technology included in all Microsoft Windows operating systems beginning with Windows 2000 to prevent programs from replacing critical Windows system files. ...


In addition, the System File Checker utility (sfc.exe) was reimplemented as a more robust command-line utility that integrated with Windows File Protection. Unlike the Windows 98 SFC utility, the new utility forces a scan of protected system files using Windows File Protection and allows the immediate silent restoration of system files from the DLLCache folder or installation media. Windows File Protection (WFP) is a technology included in all Microsoft Windows operating systems beginning with Windows 2000 to prevent programs from replacing critical Windows system files. ... Windows File Protection (WFP) is a technology included in all Microsoft Windows operating systems beginning with Windows 2000 to prevent programs from replacing critical Windows system files. ...


In Windows Me, System File Checker was replaced with System File Protection (SFP).[2]Similar to Windows File Protection, System File Protection offered real-time protection. The stand-alone SFC utility was removed and not available on Windows Me.[3] Windows Millennium Edition, or Windows Me (IPA pronunciation: [miː], [ɛm iː]), is a hybrid 16-bit/32-bit graphical operating system released on September 14, 2000 by Microsoft. ... Windows File Protection (WFP) is a technology included in all Microsoft Windows operating systems beginning with Windows 2000 to prevent programs from replacing critical Windows system files. ... Windows File Protection (WFP) is a technology included in all Microsoft Windows operating systems beginning with Windows 2000 to prevent programs from replacing critical Windows system files. ...


Issues

Older versions of System File Checker are known to override patches distributed by Microsoft. This problem has since been rectified in the newer version of System File Checker.[4]


Usage

In Windows NT-based operating systems, System File Checker can be invoked with the following command.

 sfc /scannow 

If it finds a problem, it will attempt to replace the problematic files from the DLL Cache (%WinDir%System32Dllcache). If the file is not in the DLL Cache or the DLL Cache is corrupted, the user will be prompted to insert the Windows installation media or provide the network installation path.


References

  1. ^ Description of the Windows File Protection Feature. Help and Support. Microsoft (2003-12-15). Retrieved on 2006-08-28.
  2. ^ System File Protection and Windows Me. Microsoft (2001-12-04). Retrieved on 2006-08-28.
  3. ^ Spector, Lincoln (2001-02-14). Answer Line: Windows 98 Utilities Missing in Windows Me?. PC World. IDG. Retrieved on 2006-08-28.
  4. ^ The SFC /SCANNOW Command May Overwrite Hotfix Files. Help and Support. Microsoft (2003-07-01). Retrieved on 2006-08-28.

 
 

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