SFC /SCANNOW Command - System File Checker

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  1. Posts : 10
    Win 7 64bit ultimate
       #530

    I've run SFC a couple of times. It seems my files are all in tact. But I'm curious as to know just how it detects an inconsistency in a given module. To what does it compare the given file? Or is it some kind of CRC or hash check or something? I ask because it never asks me to load the original install media (which wouldn't help anyway if I've done system updates or service packs). Biggest worry is that a rootkit can be developed to circumvent it. I've had my battles with rootkits.

    Thanks. :)
      My Computer


  2. Posts : 9
    windows 7 home premium 32 bit
       #531

    Ah right yes Iv'e done that, I learnt that a long time ago, Of course I might miss the odd one if I'm drunk etc. when I install em lol
      My Computer


  3. Posts : 47
    Windows 7 Ultimate 64-bit
       #532

    Mag, I wondered that too, but didn't quite know how to ask that "intelligent" question.
      My Computer


  4. Posts : 5
    Windows 7 Home Premium 64bit
       #533

    I dont know if this is the right place for this but I am having a freaking terrible time trying to fix these .net problems with my computer. This is the result of my sfc /scannow log and I can't fix these issues at all:

    Code:
    [l:22{11}]"dot3api.dll" of Microsoft-Windows-Dot3svc, Version = 6.1.7601.17514, pA = PROCESSOR_ARCHITECTURE_AMD64 (9), Culture neutral, VersionScope = 1 nonSxS, PublicKeyToken = {l:8 b:31bf3856ad364e35}, Type neutral, TypeName neutral, PublicKey neutral in the store, hash mismatch
    2013-10-14 20:19:57, Info                  CSI    00000092 [SR] Cannot repair member file [l:22{11}]"dot3api.dll" of Microsoft-Windows-Dot3svc, Version = 6.1.7601.17514, pA = PROCESSOR_ARCHITECTURE_AMD64 (9), Culture neutral, VersionScope = 1 nonSxS, PublicKeyToken = {l:8 b:31bf3856ad364e35}, Type neutral, TypeName neutral, PublicKey neutral in the store, hash mismatch
    2013-10-14 20:19:57, Info                  CSI    00000093 [SR] This component was referenced by [l:202{101}]"Microsoft-Windows-Foundation-Package~31bf3856ad364e35~amd64~~6.1.7601.17514.WindowsFoundationDelivery"
    2013-10-14 20:19:57, Info                  CSI    00000096 [SR] Could not reproject corrupted file [ml:520{260},l:46{23}]"\??\C:\Windows\System32"\[l:22{11}]"dot3api.dll"; source file in store is also corrupted
    
    
    2013-10-14 20:26:50, Info                  CSI    000001b2 [SR] Beginning Verify and Repair transaction
    2013-10-14 20:26:53, Info                  CSI    000001b4 [SR] Cannot repair member file [l:24{12}]"mscorjit.dll" of NetFx-MSCORJIT_DLL, Version = 6.1.7601.17966, pA = PROCESSOR_ARCHITECTURE_AMD64 (9), Culture neutral, VersionScope neutral, PublicKeyToken = {l:8 b:b03f5f7f11d50a3a}, Type neutral, TypeName neutral, PublicKey neutral in the store, hash mismatch
    2013-10-14 20:26:57, Info                  CSI    000001b6 [SR] Cannot repair member file [l:24{12}]"mscorjit.dll" of NetFx-MSCORJIT_DLL, Version = 6.1.7601.17966, pA = PROCESSOR_ARCHITECTURE_AMD64 (9), Culture neutral, VersionScope neutral, PublicKeyToken = {l:8 b:b03f5f7f11d50a3a}, Type neutral, TypeName neutral, PublicKey neutral in the store, hash mismatch
    2013-10-14 20:26:57, Info                  CSI    000001b7 [SR] This component was referenced by [l:156{78}]"Package_1_for_KB2742599~31bf3856ad364e35~amd64~~6.1.1.0.2742599-20_neutral_GDR"
    2013-10-14 20:26:57, Info                  CSI    000001ba [SR] Could not reproject corrupted file [ml:520{260},l:102{51}]"\??\C:\Windows\Microsoft.NET\Framework64\v2.0.50727"\[l:24{12}]"mscorjit.dll"; source file in store is also corrupted
    any help for this?
      My Computer


  5. Posts : 70,218
    64-bit Windows 10 Pro
    Thread Starter
       #534

    Hello Metalcut, and welcome to Seven Forums.

    See if doing what's listed in the blue Note box under step 4 in OPTION TWO may help. :)
      My Computer


  6. Posts : 5
    Windows 7 Home Premium 64bit
       #535

    Brink said:
    Hello Metalcut, and welcome to Seven Forums.

    See if doing what's listed in the blue Note box under step 4 in OPTION TWO may help. :)
    Thanks for the welcome :)

    I tried those steps. I had to download the iso image of windows 7 home premium from the linked site because its a refurbished dell that didn't come with a setup cd/dvd. The file mscorjit.dll is not a part of that iso file so I had to download that from a different site. I did replace the dot3api.dll with all of the take ownership commands and replaced it following the steps and it still didn't do anything. sfc /scannow STILL results in those 2 files being corrupt.
    There are quite a few programs that use mscorjit.dll and right now I cant use any of them
      My Computer


  7. Posts : 70,218
    64-bit Windows 10 Pro
    Thread Starter
       #536

    Using the System Update Readiness Tool to repair the component store, then running SFC again afterwards didn't help?

    If not, then you might consider a repair install to fix any remaining corrupted system files.
      My Computer


  8. Posts : 5
    Windows 7 Home Premium 64bit
       #537

    I ran the readiness tool and it installed a hotfix. After I rebooted I did another sfc /scannow ( a couple more times actually) and the same files were still giving the same errors and the programs that need mscorjit.dll still will not run. I was really hoping to not have to repair/format win7 for 2 measly files.

    What I really don't understand is I did a manual replacement of those 2 files (dot3api.dll and mscorjit.dll) and that still didn't work. why in the world would that fail?
      My Computer


  9. Posts : 70,218
    64-bit Windows 10 Pro
    Thread Starter
       #538

    Most likely their hashes don't match with a newer version from an update.

    What issues are you having other than the corrupted files? If none, then I wouldn't worry about it. If only with .Net Framework, then you might see if reinstalling that version may help.

    Download .NET for: Desktop, Server & Development | Microsoft .NET Framework
      My Computer


  10. Posts : 5
    Windows 7 Home Premium 64bit
       #539

    The mscorjit.dll is the file that is killing me. I have a few programs that require that file and every time I try and start those programs I get the "cannot find mscorjit.dll" and the program closes with no other chance to open the program. I have uninstalled and reinstalled every version of .net I could find hoping it would fix.

    edit: I have been running through Aaron Stebner's blog trying to find something that sticks.
    Aaron Stebner's WebLog - Site Home - MSDN Blogs
      My Computer


 
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