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Windows 7: SFC /SCANNOW Command - System File Checker


09 Jan 2009   #489
Brink
Microsoft MVP

64-bit Windows 8.1 Enterprise
 
 
SFC /SCANNOW Command - System File Checker

How to Repair Windows 7 System Files with System File Checker


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My System SpecsSystem Spec
14 Aug 2013   #490
Clovis5119

Windows 8 64-bit
 
 

So I've made an interesting discovery.

My keyboard is completely unresponsive in the Startup Options screen. I tried plugging it in different USB ports but to no avail. But it works fine otherwise.

This could be related to the previous BSOD errors I was having related to Hidclass.sys after running Driver Verifier, which - I think - means I'm having issues with USB drivers. But I have no idea how I would go about resolving that problem, as those seem strangely difficult to update/fix.

I know this is not on-topic with the thread, but do you have any recommendations for me?

My System SpecsSystem Spec
14 Aug 2013   #491
Brink
Microsoft MVP

64-bit Windows 8.1 Enterprise
 
 

Do you have an old PS/2 keyboard that you could use temporarily to see if you are able to run a SFC scan at boot with?

If not, then you could try doing a system restore (at boot if needed) using a restore point (if available) dated before this issue to see if it may help before having to move on to more drastic measures.
My System SpecsSystem Spec
15 Aug 2013   #492
djbillyd

Windows 7 Ultimate 64-bit
 
 
SFC /SCANNOW Command

This is an awesome thread! Man! Brink, I wanna be just like you when I grow up!!!
My System SpecsSystem Spec
15 Aug 2013   #493
Clovis5119

Windows 8 64-bit
 
 

Quote   Quote: Originally Posted by Brink View Post
Do you have an old PS/2 keyboard that you could use temporarily to see if you are able to run a SFC scan at boot with?

If not, then you could try doing a system restore (at boot if needed) using a restore point (if available) dated before this issue to see if it may help before having to move on to more drastic measures.
Hi Brink,

I was able to launch the command prompt at boot but the SFC scan still returned the same error.

I doubt a system restore will be of much use. I had been having regular BSOD issues (at a rate of about 1 per 2 days) since I built this PC. After figuring out how to read my minidump files, I found that almost all were being caused by my Network driver, which I have since updated, causing a drastic reduction in the rate of crashes.

The BSODs since always return one of the the following errors and usually occur during boot or very shortly after boot: PFN_LIST_CORRUPT, MEMORY_MANAGEMENT, DRIVER_IRQ_NOT_LESS_OR_EQUAL. I ran Memtest and the Windows Memory Diagnostic Tool but both came out clean. I also made sure that my RAM was receiving the proper voltage and that all of my drivers were up to date.

Yesterday I tried to run Driver Verifier but it caused the PC to crash upon each boot attempt until the OS automatically forced a system restore to two days prior. I found that the crashes were being caused by a Daemon Tools driver and removed the application.

I then tried to run Driver Verifier again. This time the computer could boot to the Desktop but would then crash within 5 seconds of doing so, reporting an DRIVER_VERIFIER_IOMANAGER_VIOLATION (Hidclass.sys) error.

And that's basically where I am right now.
My System SpecsSystem Spec
.


15 Aug 2013   #494
Brink
Microsoft MVP

64-bit Windows 8.1 Enterprise
 
 

Clovis,

You might consider doing a clean install to start fresh.

Otherwise, you might post in the BSOD Help and Support forum area to see if we may be able to help with that issue.
My System SpecsSystem Spec
25 Aug 2013   #495
Clovis5119

Windows 8 64-bit
 
 

Hi Brink,

I was able to run the System File Checker.

Once the process was completed, SFC reported there were some files it could not repair.

I followed the directions in Option Three to find the files the system could not repair, but sfcdetails.txt turned out empty. I've attached a copy of CBS.log to this post.

Thoughts?


Attached Files
File Type: log CBS.log (8.8 KB, 47 views)
My System SpecsSystem Spec
25 Aug 2013   #496
Brink
Microsoft MVP

64-bit Windows 8.1 Enterprise
 
 

Hello Clovis,

Did you run SFC at boot, in Safe Mode, or in Windows 7? If not in Windows 7, then you may not get a log file.

If you are still getting BSODs, then I would recommend to post a new thread BSOD Help and Support forum area to get that sorted first.

Blue Screen of Death (BSOD) Posting Instructions
My System SpecsSystem Spec
25 Aug 2013   #497
Clovis5119

Windows 8 64-bit
 
 

Quote   Quote: Originally Posted by Brink View Post
Hello Clovis,

Did you run SFC at boot, in Safe Mode, or in Windows 7? If not in Windows 7, then you may not get a log file.

If you are still getting BSODs, then I would recommend to post a new thread BSOD Help and Support forum area to get that sorted first.

Blue Screen of Death (BSOD) Posting Instructions
Ran it in Safe Mode.
My System SpecsSystem Spec
25 Aug 2013   #498
Brink
Microsoft MVP

64-bit Windows 8.1 Enterprise
 
 

Ah, that's why there's no log then.
My System SpecsSystem Spec
25 Aug 2013   #499
Joeaa

Windows 7 Home Premium 64bit
 
 

Did a sfc /scannow . I got the file using copy cbs.log a.txt
Question: How can I read it. What tells me what was replaced.
or what was not replaced?

It said, it was successful
Joe
My System SpecsSystem Spec
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