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How to Repair Windows 7 System Files with System File Checker
The sfc /scannow command (System File Checker) scans the integrity of all protected Windows 7 system files and replaces incorrect corrupted, changed/modified, or damaged versions with the correct versions if possible.
If you get the Windows Resource Protection Could Not Start the Repair Service error when trying to run SFC, then make sure that the Windows Modules Installer service is enabled and set to Manual.
Be aware that if you have modified your system files as in theming explorer/system files, running sfc /scannow will revert the system files such as explorer.exe back to it's default state. Make the appropriate backups of your system files that you have modified for theming if you wish to save them before running sfc /scannow.
1. Open an "elevated command prompt" (right click -> Run as administrator), and do step 2 or 3 below for what type of scan you would like to run.
2.To Scan and Repair System Files NOTE:Scans the integrity of all protected system files and repairs the system files if needed. Please see red WARNING box at the top of this tutorial.
A) In the elevated command prompt, type sfc /scannow and press Enter. (see screenshot below) NOTE:This may take a little bit to finish.
B) Go to step 4.
3.To Only Verify if the System Files are Corrupted NOTE:Scans and only verifies the integrity of all proteced system files only. This command will not change your system files as in the red WARNING box at the top of this tutorial.
A) In the elevated command prompt, type sfc /verifyonly and press Enter.
4. When the scan is complete, hopefully you will see all is ok like the screenshot below.
If SFC could not fix something, then run the command again to see if it may be able to the next time. Sometimes it may take running the sfc /scannow command 3 or more times to completely fix everything that it's able to.
If still not, then try using OPTION ONE above to run the sfc /scannow command at boot.
If still not, then you can attempt to run a System Restore using a restore point dated before the bad file occured to fix it. You may need to repeat doing a System Restore until you find a older restore point that may work.
If still not, then you can use the steps in the TIP box in the OPTION THREE section below to manually replace the files that SFC could not fix.
5. When done, close the elevated command prompt.
How to See and Read Only the "SFC" Scan Results from the CBS.LOG
NOTE:When SFC runs, it logs it's actions into the C:\Windows\Logs\CBS\CBS.log. The steps in this option will show you how to see only the specific SFC entries with the [SR] tags in this CBS.log. This can be helpful to show you what files SFC could not fix automatically if you wanted to try and manually replace them.
2. In the elevated command prompt, copy and paste the command below, and press Enter. (See screenshot below) NOTE:This will place a sfcdetails.txt file on your desktop with only the SFC scan result details from the CBS.LOG in it.
System Manufacturer/Model Number Dilithium Computers/Engineering (Myself) Star date 42.739285.5432.9 OS Win7 Ultimate x64 on Desktop / Win7 Ultimate x86 on laptop / Win7 x86 Starter on Netbook CPU AMD Phenom 965 X4 3.4Ghz cpu Black Edition Motherboard Gigabyte 790XT Memory 12 Gb DDR3 Graphics Card Nvidea Gforce GTX 470 Sound Card Onboard Realtek hi-fi Monitor(s) Displays Lg 3D led 23" Screen Resolution 1920x1080
Keyboard Logitech wireless K350 Mouse Inferno gaming mouse PSU OCZ 700W GameXstream Case Artec 10000 Cooling On board + many case fans Hard Drives Loads maxstore sata 1 & 2/ loads of partitions + 1Tb Hitachi sata 2. 256Gb Crucial ssd. Internet Speed Talk talk. 10Mb Other Info My PC was hand built with matchsticks. xbox 360 controller. Printers,fax.........
System Manufacturer/Model Number Tx2500z Tablet Pc/Homemade Server OS Windows 7 Ult x64(x2), HomePrem x32(x4), Server 08 (+VM), 08 R2 (VM) , SuSe 11.2 (VM), XP 32 (VM) CPU Turion X2 ultra (oh well came with laptop)/P4 @3.2 (yes P4) Motherboard IDK HP Motherboard / Intel DG965SS Memory OCZ Dual Channel 4GB kit/ 1gb Dual Channel Graphics Card HD 3200 graphics /GMA x3100 (yay for intergrated!!) Sound Card Realtek HD Audio(mic working, well sort of)/Siig IC-70012 Monitor(s) Displays built-in Hp 12" laptop screen/ Acer 19" Screen Resolution 1280x800 /1440x900
Mouse Logi MX Rev. /MS Wheel Optical 1.1A /Logitech Optical Mouse Cooling All Air Cooled Internet Speed College baby but its still routed through vpn to 1536k... Other Info love my wacom pen and pressure sensitivity...
wished it worked in 7, SUSE for that matter though
System Manufacturer/Model Number Self-Build OS Windows 7 RC 7100 CPU Intel c2q6600 oc'd @4239Mhz 1.68v w/mod'd VapoChill LS Motherboard Asus Rampage Extreme Memory 2gb Ocz Flex II DDR3 2000 8-8-8-24 2.2v Graphics Card 2x Asus 3870x2 Tops in quad xfire Sound Card Asus SupremeFX X-FI Monitor(s) Displays 1-HP 2408 24'' LCD & 1-Viewsonic VG2230wm 22'' LCD Screen Resolution 1920x1200 & 1600x1200
Keyboard Logitech Di Novo Edge Keyboard & Optimus Mini 3 Keyboard Mouse Saitek Obsidian mouse & 3D Connexion Space Pilot 3D mouse PSU 1x Apevia 680watt & 1x Logisys 550watt Case 2x Custom Plexiglass cases 1-PC & 1- LS Phase Change Cooling Aqua Computer 360xt single loop north/south & Flex II DDR3 Hard Drives 2x WD Caviar 160gb in Raid0
1x 1TB backup
Sony optical drive
Samsung optical drive Internet Speed not worth mentioning Other Info Upek Fingerprint reader
Plantronic 590 Bluetooth headset
HP 7550 Photo Printer
HP 4670 See-Thru Scanner
NextEngine 3D Scanner
Enzotech north, south and mosfet blocks, 4xDanger Den Maze-5 vga blocks, //UPGRADES COMING SOON//
Koolance liquid-cooled psu, i7 975, Rampage II Extreme
You could type sfc /? in the elevated command prompt for a complete list of sfc commands to use, but sfc /scannow is the best option to scan and repair all protected system files command. No other suffixes that I know of though.