3660:
3671:
341:
System File
Checker in Windows Vista and later Windows operating systems can scan specified files. Also, scans can be performed against an offline Windows installation folder to replace corrupt files, in case the Windows installation is not bootable. For performing offline scans, System File Checker
235:
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
262:) was reimplemented as a more robust command-line utility that integrated with WFP. 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
319:). 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. System File Checker determines the Windows installation source path from the registry values
353:" (DISM) for Windows 10, Windows 8.1, Windows 8, Windows Server 2012 R2 or Windows Server 2012. This tool checks the store against its own payload and repairs the corruptions that it detects by downloading required files through Windows update.
1959:
349:
In cases where the component store is corrupted, the "System Update
Readiness tool" (CheckSUR) can be installed on Windows 7, Windows Vista, Windows Server 2008 R2 or Windows Server 2008, replaced by "
285:
The System File
Checker component included with versions of Windows 2000 earlier than Service Pack 4 overrode patches distributed by Microsoft; this was rectified in Windows 2000 Service Pack 4.
1939:
491:
200:(ACLs) defined for protected resources. If any changes are detected to a protected system file, the modified file is restored from a cached copy located in a folder at
342:
must be run from another working installation of
Windows Vista or a later operating system or from the Windows setup DVD or a recovery drive which gives access to the
1748:
616:"System File Checker does not accept a network location that contains the installer CD when you use the scannow switch in Windows XP SP2 or in Windows Server 2003"
2675:
244:. 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
690:
350:
2690:
2855:
1932:
813:
781:
394:
You do not need to hack the
Registry to change the WFP settings. A command-line utility comes with Windows Server 2003 to set these values. Called the
2512:
1492:
224:, Microsoft has since implemented a number of security measures to protect system files from malicious attacks, corruptions, or problems such as
668:
3546:
1925:
1838:
737:
186:. If any changes are detected to a protected system file, the modified file is restored from a cached copy located in a compressed folder at
3675:
1948:
2925:
2565:
2149:
1984:
3097:
3006:
2522:
2154:
1446:
760:
642:"You are prompted to insert a Windows XP SP2 CD when you try to run the System File Checker tool on a Windows XP SP2-based computer"
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2700:
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334:(ACLs), and if it finds a problem, it will attempt to replace the problematic files from the Windows Side-by-side Backup (
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2880:
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2097:
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327:. It may keep prompting for the installation media even if the user supplies it if these values are not correctly set.
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2012:
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Windows
Administration at the Command Line for Windows Vista, Windows 2003, Windows XP, and Windows 2000
204:. Permission for full access to modify WRP-protected resources is restricted to the processes using the
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can be used to check specific folder paths, including the
Windows folder and the boot folder.
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If it finds a problem, it will attempt to replace the problematic files from the DLL Cache (
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55:
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2017:
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Due to problems with
Windows applications being able to overwrite system files in
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Description of
Windows XP and Windows Server 2003 System File Checker (Sfc.exe)
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In Windows NT-based operating systems, System File Checker can be invoked via
270:
232:
221:
161:
149:
141:
25:
691:"Fix Windows Update errors by using the DISM or System Update Readiness tool"
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2956:
2590:
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2427:
2197:
1878:
1587:
1124:
965:
782:
Use the System File Checker tool to repair missing or corrupted system files
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531:
464:
255:
introduced real-time file protection, called Windows File Protection (WFP).
241:
157:
30:
569:
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132:
that allows users to scan for and restore corrupted Windows system files.
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keys and folders as well as critical system files. Under Windows Vista,
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2007:
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997:
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196:(WRP) works by setting discretionary access-control lists (DACLs) and
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Boswell, William (2003). "Using the System File Checker, SFC".
182:(WFP) works by registering for notification of file changes in
3047:
2379:
2349:
2274:
248:; therefore, no preventive or reactive measure was available.
212:). Administrators no longer have full rights to system files.
669:"Run System File Checker Tool to Repair Windows 10/8/7 files"
492:"Answer Line: Windows 98 Utilities Missing in Windows Me?"
277:(SFP). Similar to WFP, SFP offered real-time protection.
330:
In Windows Vista and onwards, files are protected using
558:"The SFC /SCANNOW Command May Overwrite Hotfix Files"
457:"Description of the Windows File Protection Feature"
297:(with Admin privilege), with the following command:
3614:
3509:
3278:
3197:
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3163:
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3020:
2944:
2769:
2636:
2551:
2498:
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1993:
1821:
1793:
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1621:
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1397:
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1163:
1052:
1011:
901:
864:
308:
301:
93:
78:
66:
54:
36:
24:
402:directory files if files are accidentally deleted.
338:). However, the above command has not changed.
258:In addition, the System File Checker utility (
1933:
807:
415:"MS-DOS and Windows command line SFC command"
251:All Windows NT-based operating systems since
8:
351:Deployment Image Service and Management Tool
231:System File Checker was first introduced on
19:
398:, or SFC, the utility can also rebuild the
3670:
3194:
1940:
1926:
1918:
814:
800:
792:
18:
164:, System File Checker is integrated with
528:"System File Protection and Windows Me"
362:
726:Windows 2000 Commands Pocket Reference
656:from the original on February 7, 2007.
592:"SFC - System File CheckerWindows CMD"
490:Spector, Lincoln (February 14, 2001).
433:"Protected Resource List - Win32 apps"
3547:Next-Generation Secure Computing Base
471:from the original on October 20, 2004
7:
426:
424:
2676:Distributed Transaction Coordinator
148:and all subsequent versions of the
3007:User Interface Privilege Isolation
626:. January 13, 2005. Archived from
568:. October 30, 2006. Archived from
534:. December 4, 2011. Archived from
140:Microsoft ships this utility with
14:
206:Windows Modules Installer service
3669:
3659:
3658:
675:. Self Published. Archived from
152:family of operating systems. In
2736:Remote Differential Compression
3592:Windows System Assessment Tool
376:. Inside Series. p. 860.
266:folder or installation media.
1:
667:kumar, Rohit (26 July 2016).
2881:Open XML Paper Specification
2741:Remote Installation Services
1949:Microsoft Windows components
344:Windows Recovery Environment
3033:Windows Subsystem for Linux
2992:Mandatory Integrity Control
2746:Windows Deployment Services
2543:Wireless Zero Configuration
194:Windows Resource Protection
166:Windows Resource Protection
16:Windows system file utility
3723:
3135:Universal Windows Platform
2841:Kernel Transaction Manager
2826:Hardware Abstraction Layer
2523:Multimedia Class Scheduler
747:John Paul Mueller (2007).
373:Inside Windows Server 2003
317:%WinDir%\System32\dllcache
273:, as it was replaced with
188:%WinDir%\System32\dllcache
3654:
3587:Windows Services for UNIX
2972:Data Execution Prevention
2821:Graphics Device Interface
2711:Network Access Protection
2330:Remote Desktop Connection
1955:
1892:
836:
431:stevewhims (2021-01-07).
2952:Security and Maintenance
2896:Security Account Manager
2490:Windows XP visual styles
3537:Media Control Interface
3371:Help and Support Center
2987:Kernel Patch Protection
2751:System Resource Manager
2731:Remote Desktop Services
2726:Print Services for UNIX
2508:Service Control Manager
2118:Windows Error Reporting
2038:DirectX Diagnostic Tool
180:Windows File Protection
3702:Windows administration
3517:Desktop Cleanup Wizard
3093:COM Structured storage
2794:Desktop Window Manager
2686:Windows Media Services
865:File system navigation
724:Frisch, Æleen (2001).
679:on September 11, 2016.
336:%WinDir%\WinSxS\Backup
295:Windows Command Prompt
275:System File Protection
269:SFC did not appear on
202:%WinDir%\WinSxS\Backup
168:(WRP), which protects
42:; 26 years ago
3145:Windows Mixed Reality
2816:Enhanced Write Filter
2666:Roaming user profiles
1907:Windows Support Tools
1902:Environment variables
753:John Wiley & Sons
467:. December 15, 2003.
325:ServicePackSourcePath
3426:Mobile Device Center
3376:Health & Fitness
3174:Solitaire Collection
3002:User Account Control
2997:Protected Media Path
2901:Server Message Block
2851:Logical Disk Manager
2103:System Policy Editor
2088:System Configuration
1897:List of DOS commands
1795:Software development
1622:Maintenance and care
777:sfc | Microsoft Docs
630:on January 16, 2007.
572:on November 16, 2006
332:access control lists
304:(to repair problems)
210:TrustedInstaller.exe
198:access control lists
3572:Virtual DOS machine
2916:System Idle Process
2891:Resource Protection
2799:Portable Executable
2691:Active DRM Services
2093:System File Checker
2063:Performance Monitor
437:learn.microsoft.com
396:System File Checker
122:System File Checker
88:commercial software
21:
3707:Windows components
3577:Windows on Windows
3301:Backup and Restore
3113:Transaction Server
2831:I/O request packet
2671:Folder redirection
2340:Speech Recognition
2098:System Information
2053:Management Console
851:Windows PowerShell
701:. January 22, 2017
128:) is a utility in
40:June 25, 1998
3684:
3683:
3610:
3609:
3567:Video for Windows
3522:Games for Windows
3391:Internet Explorer
2485:Windows Spotlight
2128:Windows Installer
1915:
1914:
739:978-0-596-00148-3
130:Microsoft Windows
119:
118:
111:/windows-commands
61:Microsoft Windows
3714:
3697:Windows commands
3673:
3672:
3662:
3661:
3582:Windows SideShow
3361:Food & Drink
3255:Spider Solitaire
3195:
3088:ActiveX Document
3056:Active Scripting
3012:Windows Firewall
2967:Credential Guard
2646:Active Directory
2443:Indexing Service
2073:Resource Monitor
2068:Recovery Console
1942:
1935:
1928:
1919:
1266:User environment
856:Recovery Console
816:
809:
802:
793:
766:
743:
711:
710:
708:
706:
687:
681:
680:
664:
658:
657:
652:. July 5, 2005.
638:
632:
631:
612:
606:
605:
603:
602:
588:
582:
581:
579:
577:
554:
548:
547:
545:
543:
538:on June 22, 2004
524:
518:
517:
515:
513:
504:. Archived from
487:
481:
480:
478:
476:
453:
447:
446:
444:
443:
428:
419:
418:
411:
405:
404:
401:
391:
390:
367:
337:
326:
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318:
310:
303:
261:
211:
203:
189:
175:
115:
112:
110:
108:
106:
104:
102:
100:
56:Operating system
50:
48:
43:
22:
3722:
3721:
3717:
3716:
3715:
3713:
3712:
3711:
3687:
3686:
3685:
3680:
3650:
3618:Microsoft Store
3616:
3606:
3552:POSIX subsystem
3532:File Protection
3505:
3476:Program Manager
3461:Phone Companion
3451:Outlook Express
3401:Make Compatible
3331:Desktop Gadgets
3291:Anytime Upgrade
3274:
3186:
3159:
3150:Windows Runtime
3042:
3016:
2982:Family features
2940:
2765:
2721:DFS Replication
2632:
2547:
2538:Error Reporting
2494:
2394:
2270:Mobility Center
2265:Movies & TV
2159:
2143:Windows Insider
2033:Driver Verifier
2028:Drive Optimizer
1995:
1989:
1980:Booting process
1951:
1946:
1916:
1911:
1888:
1817:
1789:
1758:Boot management
1753:
1617:
1476:
1393:
1342:
1261:
1225:
1159:
1053:Disk management
1048:
1007:
902:File management
897:
860:
832:
820:
773:
763:
746:
740:
723:
720:
718:Further reading
715:
714:
704:
702:
689:
688:
684:
666:
665:
661:
640:
639:
635:
614:
613:
609:
600:
598:
590:
589:
585:
575:
573:
556:
555:
551:
541:
539:
526:
525:
521:
511:
509:
508:on June 5, 2011
489:
488:
484:
474:
472:
455:
454:
450:
441:
439:
430:
429:
422:
413:
412:
408:
399:
388:
386:
384:
369:
368:
364:
359:
335:
324:
320:
316:
309:sfc /verifyonly
291:
283:
259:
246:file attributes
218:
209:
201:
187:
173:
138:
109:/administration
107:/windows-server
97:
46:
44:
41:
37:Initial release
17:
12:
11:
5:
3720:
3718:
3710:
3709:
3704:
3699:
3689:
3688:
3682:
3681:
3679:
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3655:
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3524:
3519:
3513:
3511:
3507:
3506:
3504:
3503:
3498:
3493:
3488:
3483:
3481:Steps Recorder
3478:
3473:
3468:
3463:
3458:
3453:
3448:
3443:
3438:
3433:
3428:
3423:
3418:
3413:
3408:
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3383:
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3373:
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3358:
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3333:
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3313:
3308:
3303:
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3273:
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3258:
3251:
3244:
3237:
3230:
3223:
3216:
3209:
3201:
3199:
3192:
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3187:
3185:
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3177:
3169:
3167:
3161:
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3158:
3157:
3152:
3147:
3142:
3137:
3132:
3127:
3122:
3117:
3116:
3115:
3110:
3108:OLE Automation
3105:
3100:
3095:
3090:
3085:
3075:
3074:
3073:
3068:
3063:
3052:
3050:
3044:
3043:
3041:
3040:
3035:
3030:
3024:
3022:
3018:
3017:
3015:
3014:
3009:
3004:
2999:
2994:
2989:
2984:
2979:
2974:
2969:
2964:
2959:
2954:
2948:
2946:
2942:
2941:
2939:
2938:
2933:
2928:
2923:
2918:
2913:
2908:
2903:
2898:
2893:
2888:
2883:
2878:
2876:Object Manager
2873:
2868:
2863:
2858:
2853:
2848:
2843:
2838:
2836:Imaging Format
2833:
2828:
2823:
2818:
2813:
2812:
2811:
2806:
2796:
2791:
2786:
2781:
2775:
2773:
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2763:
2758:
2753:
2748:
2743:
2738:
2733:
2728:
2723:
2718:
2713:
2708:
2703:
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846:Command Prompt
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3381:HyperTerminal
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3351:Easy Transfer
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3021:Compatibility
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2408:Action Center
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2013:Control Panel
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2003:App Installer
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1964:Architecture
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1822:Miscellaneous
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1347:File contents
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3631:File Manager
3471:Photo Viewer
3406:Media Center
3366:Groove Music
3296:Address Book
3267:
3260:
3253:
3248:Purble Place
3246:
3239:
3232:
3225:
3218:
3213:Chess Titans
3211:
3204:
3191:Discontinued
3179:
3172:
2871:Ntoskrnl.exe
2779:Boot Manager
2771:Architecture
2661:Group Policy
2553:File systems
2453:Saved search
2360:Sticky Notes
2325:Quick Assist
2253:Media Player
2223:Feedback Hub
2218:Fax and Scan
2113:Task Manager
2092:
2043:Event Viewer
2023:Disk Cleanup
1693:
826:command-line
748:
725:
705:February 11,
703:. Retrieved
694:
685:
677:the original
672:
662:
645:
636:
628:the original
619:
610:
599:. Retrieved
595:
586:
574:. Retrieved
570:the original
561:
552:
540:. Retrieved
536:the original
522:
512:December 26,
510:. Retrieved
506:the original
495:
485:
473:. Retrieved
460:
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440:. Retrieved
436:
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387:. Retrieved
372:
365:
348:
340:
329:
314:
302:sfc /scannow
292:
284:
268:
263:
257:
253:Windows 2000
250:
230:
219:
205:
192:
178:
146:Windows 2000
139:
125:
121:
120:
26:Developer(s)
3646:Minesweeper
3615:Spun off to
3436:MSN Dial-up
3431:Movie Maker
3336:Diagnostics
3286:ActiveMovie
3028:COMMAND.COM
2906:Shadow Copy
2761:Server Core
2601:Mount Point
2528:Shadow Copy
2123:Windows Ink
1674:pnpunattend
1644:eventcreate
1639:driverquery
1598:ssh-keyscan
841:COMMAND.COM
576:February 1,
311:(no repair)
85:Proprietary
3691:Categories
3626:DVD Player
3441:NetMeeting
3341:DriveSpace
3206:3D Pinball
2706:SharePoint
2470:Start menu
2315:Phone Link
2178:Calculator
2133:PowerShell
1994:Management
1704:systeminfo
1593:ssh-keygen
1481:Networking
1125:manage-bde
1095:diskshadow
601:2023-09-12
542:August 28,
475:August 28,
442:2024-03-15
389:2017-07-23
357:References
321:SourcePath
271:Windows ME
233:Windows 98
222:Windows 95
162:Windows 10
150:Windows NT
142:Windows 98
101:.microsoft
47:1998-06-25
3421:Messenger
3416:Messaging
3346:DVD Maker
3316:CD Player
3311:CardSpace
3262:Solitaire
2962:BitLocker
2957:AppLocker
2591:Hard link
2480:Task View
2458:Namespace
2428:ClearType
2248:Messaging
2233:Magnifier
2198:Clipchamp
2173:3D Viewer
1879:tpmvscmgr
1588:ssh-agent
1493:bitsadmin
1399:Scripting
1164:Processes
1012:Archiving
966:openfiles
699:Microsoft
673:Craxworld
650:Microsoft
624:Microsoft
566:Microsoft
532:Microsoft
465:Microsoft
242:file path
158:Windows 7
31:Microsoft
3665:Category
3542:MS-DOS 7
3527:ScanDisk
3446:NTBackup
3326:Contacts
3306:Cardfile
3241:Hold 'Em
3220:FreeCell
3066:VBScript
2977:Defender
2945:Security
2931:Winlogon
2886:Registry
2500:Services
2433:Explorer
2418:AutoPlay
2305:Paint 3D
2290:OneDrive
2280:Narrator
2228:Get Help
2183:Calendar
2078:Settings
2048:IExpress
1854:gpupdate
1849:gpresult
1775:bootsect
1734:wevtutil
1714:typeperf
1709:tracerpt
1699:sxstrace
1684:REAgentC
1669:ntbackup
1634:dispdiag
1629:auditpol
1543:PathPing
1538:nslookup
1513:ipconfig
1508:hostname
1437:forfiles
1288:graftabl
1257:regsvr32
1230:Registry
1221:tasklist
1216:taskkill
1206:shutdown
1201:schtasks
1186:powercfg
1155:vssadmin
1140:scandisk
1130:refsutil
1100:drvspace
1090:diskraid
1085:diskpart
1080:diskcopy
1075:diskcomp
1024:extrac32
993:robocopy
978:(rename)
730:O'Reilly
654:Archived
596:SS64.com
497:PC World
469:Archived
400:D11Cache
264:DLLCache
226:DLL Hell
184:Winlogon
170:registry
136:Overview
3641:Mahjong
3562:Interix
3496:WinHelp
3396:Journal
3386:Imaging
3234:InkBall
3120:DirectX
3083:ActiveX
3071:JScript
2784:Console
2756:Hyper-V
2651:Domains
2475:Taskbar
2448:IFilter
2423:AutoRun
2385:WordPad
2380:Weather
2295:OneNote
2285:Notepad
2208:Cortana
2083:Sysprep
1874:tpmtool
1808:exe2bin
1780:fixboot
1770:bootcfg
1765:bcdedit
1739:winmgmt
1729:wecutil
1724:WBAdmin
1679:pnputil
1664:msiexec
1659:mofcomp
1603:tracert
1583:ssh-add
1553:rpcping
1533:netstat
1518:nbtstat
1472:timeout
1417:cscript
1379:findstr
1065:convert
1034:makecab
1029:extract
998:takeown
982:replace
971:recover
940:deltree
936:(erase)
924:compact
874:(chdir)
823:Windows
695:Support
646:Support
620:Support
562:Support
461:Support
260:sfc.exe
216:History
174:sfc.exe
94:Website
80:License
45: (
3674:
3663:
3636:Hover!
3510:Others
3491:Travel
3486:Syskey
3269:Tinker
3227:Hearts
3155:WinUSB
3140:WinAPI
3125:Native
2936:WinUSB
2861:MinWin
2638:Server
2438:Search
2350:Sports
2320:Photos
2310:People
2188:Camera
1869:pentnt
1864:MSCDEX
1813:QBasic
1785:fixmbr
1744:winsat
1654:logman
1568:setspn
1503:getmac
1462:prompt
1422:doskey
1407:choice
1338:whoami
1308:setver
1278:cmdkey
1252:regini
1115:fsutil
1110:format
1070:defrag
1060:chkdsk
1019:expand
956:mklink
945:icacls
919:cipher
909:attrib
759:
736:
380:
281:Issues
105:/en-us
3602:WinFS
3501:Write
3198:Games
3165:Games
3038:WoW64
2866:NTLDR
2856:LSASS
2789:CSRSS
2596:links
2571:exFAT
2400:Shell
2365:Store
2355:Start
2345:Skype
2300:Paint
2275:Money
2203:Clock
2150:WinRE
2058:Netsh
1996:tools
1985:Games
1844:dpath
1829:break
1803:debug
1719:w32tm
1689:relog
1613:winrs
1608:winrm
1558:route
1528:netsh
1457:pause
1384:print
1364:edlin
1333:where
1323:title
1242:ftype
1237:assoc
1211:start
1191:runas
1135:subst
1120:label
1105:fdisk
1003:xcopy
987:rmdir
950:mkdir
914:cacls
888:pushd
289:Usage
3676:List
3557:HPFS
3321:Chat
3279:Apps
3181:Surf
3130:.NET
3098:DCOM
2926:WHEA
2921:USER
2911:SMSS
2701:WSUS
2681:MSMQ
2623:ReFS
2586:NTFS
2561:CDFS
2518:CLFS
2513:BITS
2413:Aero
2390:Xbox
2370:Tips
2258:2022
2243:Maps
2238:Mail
2213:Edge
2165:Apps
1960:APIs
1859:help
1839:dism
1749:wmic
1573:sftp
1548:ping
1498:curl
1452:more
1442:goto
1427:echo
1412:clip
1389:type
1374:find
1359:edit
1354:comp
1318:time
1313:setx
1298:path
1293:mode
1283:date
1273:chcp
1181:kill
1176:exit
989:(rd)
961:move
952:(md)
929:copy
893:tree
883:popd
757:ISBN
734:ISBN
707:2017
578:2010
544:2006
514:2011
477:2006
378:ISBN
323:and
240:and
160:and
113:/sfc
103:.com
99:docs
68:Type
3456:Pay
3356:Fax
3103:OLE
3078:COM
3061:WSH
3048:API
2809:DLL
2804:EXE
2716:PWS
2696:IIS
2656:DNS
2628:UDF
2616:EFS
2611:TxF
2581:FAT
2576:IFS
2566:DFS
2155:WMI
1884:wsl
1834:cls
1694:sfc
1578:ssh
1563:scp
1523:net
1488:arp
1467:rem
1432:for
1328:ver
1303:set
1247:reg
1150:vol
1145:sys
1044:tar
1039:pax
976:ren
934:del
878:dir
502:IDG
307:or
126:SFC
20:sfc
3693::
1973:NT
1968:9x
1447:if
1369:fc
1196:sc
1171:at
872:cd
755:.
751:.
732:.
728:.
697:.
693:.
671:.
648:.
644:.
622:.
618:.
594:.
564:.
560:.
530:.
500:.
494:.
463:.
459:.
435:.
423:^
392:.
346:.
228:.
190:.
156:,
144:,
1941:e
1934:t
1927:v
815:e
808:t
801:v
765:.
742:.
709:.
604:.
580:.
546:.
516:.
479:.
445:.
417:.
208:(
124:(
49:)
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