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Windows 7: SFC /SCANNOW Command - System File Checker

19 Aug 2015   #840

Microsoft Community Contributor Award Recipient

Win 7 x64 Home Premium (and x86 VirtualBox VM)/Win10

Brink - that command has to be run from the Repair Environment, I thought?

My System SpecsSystem Spec
19 Aug 2015   #841

64-bit Windows 10 Pro

You're correct.
My System SpecsSystem Spec
21 Aug 2015   #842

Windows 7 Home Premium
mmc.exe file corrupted

I have run sfc /scannow 4 times and each time the results are the same. The log says the file and its' backup are corrupted.

I am running Windows 7 Professional 64-bit on a Dell Inspiron 620 with 6 mb of ram.

The sfcdetails.txt file is attached.

I will appreciate your guidance as to what I now need to do.

Attached Files
File Type: txt sfcdetails.txt (141.8 KB, 93 views)
My System SpecsSystem Spec
21 Aug 2015   #843

64-bit Windows 10 Pro

Hello Charlie, and welcome to Seven Forums.

Your SFC details show that the file below has a hash mismatch. You can see if any of the options in the blue note box under step 4 in OPTION TWO may help.

My System SpecsSystem Spec

30 Aug 2015   #844

Win 10 Pro
Very slow 45 min Boot

have run 4 times SFC and keeps finding errors. Can you help me determine what to do?

Uprgraded from win 7 Pro x64 to Win 10 Pro 10 days ago,, firts week startup was perfect, then something happend, an upgrade or externar program, don't know.

Alse have read in other forums to run
DISM.exe /Online /Cleanup-image /Scanhealth
Dism.exe /Online /Cleanup-Image /CheckHealth
DISM.exe /Online /Cleanup-image /Restorehealth
Dism.exe /Online /Cleanup-Image /startComponentCleanup

Also found some errors, but didn't know what to do..

I'm attaching SFC log

My System SpecsSystem Spec
30 Aug 2015   #845

64-bit Windows 10 Pro

Hello FlashTV, and welcome to Seven Forums.

It would be best to post at our sister site for Windows 10 issues instead.
My System SpecsSystem Spec
31 Aug 2015   #846

Dual boot - Win 7 Pro 64-bit and Win 10 Pro 64-bit

Brink - I have many many many ntsf error messages after each reboot of Win 7 Pro 64-bit. (If you want to see how that started, check out Almost FORCED to update to Win 10 ??? NO!!! Help !!! .)

Just now, in Win 7, I ran sfc /verifyonly and the CBS log reports errors. (And there seem to be amazingly long CBS "persist" .cab logs in the same folder from the past few days that I have not opened up.)

Question: If I run sfc /scannow, is there a downside? Could it wreck my Win 7? (Not the end of the world because I really haven't started using it yet. Worst case, I could reinstall, even if it takes a whole weekend. But another lost weekend)
Important detail: My Dell Optiplex 7010 Desktop is now dual-booting Win 7 Pro 64-bit and Win 10 Pro 64-bit. (I got the Win 10 by letting my Win 8.1 upgrade, then re-installed the Win 10 from a media creation USB.) The Win 10 seems to be working OK and I want to keep the dual-booting. Does that change your thinking?

My System SpecsSystem Spec
31 Aug 2015   #847

64-bit Windows 10 Pro

Hello glnz,

A sfc /scannow command will not affect anything other than repairing corrupted or modified system files.
My System SpecsSystem Spec
31 Aug 2015   #848

Dual boot - Win 7 Pro 64-bit and Win 10 Pro 64-bit

Brinks - thanks old man. Helped. The thousands of ntfs errors have stopped.
My System SpecsSystem Spec
31 Aug 2015   #849

64-bit Windows 10 Pro

That's great news glnz.
My System SpecsSystem Spec

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