SFC /scannow extremely slow?


JohnnyGui

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Windows Pro 11 22H2 Build 22621.1992
After installing May's Cumulative Updates including the Preview (now at build 22000.708) I noticed the sfc /scannow takes a lot of time to complete. The first time it successfully repaired files but even the 2nd scan is very slow. It wasn't like this before

Is anyone else having this issue?
 

My Computer

System One

  • OS
    Windows Pro 11 22H2 Build 22621.1992
    Computer type
    PC/Desktop
    Manufacturer/Model
    Custom built
    CPU
    i5-12600K
    Motherboard
    Gigabyte Z690 UD DDR4
    Memory
    Transcend 16GB
    Graphics Card(s)
    Zotac 4070Ti Trinity
    Sound Card
    Internal: Realtek® ALC892 codec
    Monitor(s) Displays
    Asus VZ239-H
    Screen Resolution
    1080p
    Hard Drives
    Kingston 500GB nVME
    Case
    Fractal Focus 2 RGB White
    Cooling
    Xilence LQ240PRO Watercooling
    Browser
    Edge Chromium
Nothing unusual here, everything running great ! Even ran sfc /scannow ..... it was quick as usual !

Chuck
 

My Computer

System One

  • OS
    Windows11 23H2 (OS Build 22631.2428)
    Computer type
    PC/Desktop
    Manufacturer/Model
    HP HP ENVY TE01
    CPU
    2.90 gigahertz Intel Core i7-10700
    Motherboard
    Board: HP 8767 A (SMVB)
    Memory
    16214 Megabytes Usable Installed Memor
    Hard Drives
    1511.52 Gigabytes Usable Hard Drive Capacity
    1418.15 Gigabytes Hard Drive Free Space
    Keyboard
    Logitech wireless
    Mouse
    M 185 wireless
    Internet Speed
    12 ms Jitter 8 ms Download 10.5 Mbps Upload 1.7
    Browser
    Edge & FF
    Antivirus
    Windows Defender
Nothing unusual here, everything running great ! Even ran sfc /scannow ..... it was quick as usual !

Chuck
Have you installed all the latest Windows (optional) updates?
 

My Computer

System One

  • OS
    Windows Pro 11 22H2 Build 22621.1992
    Computer type
    PC/Desktop
    Manufacturer/Model
    Custom built
    CPU
    i5-12600K
    Motherboard
    Gigabyte Z690 UD DDR4
    Memory
    Transcend 16GB
    Graphics Card(s)
    Zotac 4070Ti Trinity
    Sound Card
    Internal: Realtek® ALC892 codec
    Monitor(s) Displays
    Asus VZ239-H
    Screen Resolution
    1080p
    Hard Drives
    Kingston 500GB nVME
    Case
    Fractal Focus 2 RGB White
    Cooling
    Xilence LQ240PRO Watercooling
    Browser
    Edge Chromium
After installing May's Cumulative Updates including the Preview (now at build 22000.708) I noticed the sfc /scannow takes a lot of time to complete. The first time it successfully repaired files but even the 2nd scan is very slow. It wasn't like this before

Is anyone else having this issue?


Generally...

Only run SFC after a reboot.
And if run after DISM... it will be slow.
Has nothing to do with the updates though.

True for Win 10/11
 

My Computers

System One System Two

  • OS
    Win 11 Home ♦♦♦22631.3737 ♦♦♦♦♦♦♦23H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    Built by Ghot® [May 2020]
    CPU
    AMD Ryzen 7 3700X
    Motherboard
    Asus Pro WS X570-ACE (BIOS 4702)
    Memory
    G.Skill (F4-3200C14D-16GTZKW)
    Graphics Card(s)
    EVGA RTX 2070 (08G-P4-2171-KR)
    Sound Card
    Realtek ALC1220P / ALC S1220A
    Monitor(s) Displays
    Dell U3011 30"
    Screen Resolution
    2560 x 1600
    Hard Drives
    2x Samsung 860 EVO 500GB,
    WD 4TB Black FZBX - SATA III,
    WD 8TB Black FZBX - SATA III,
    DRW-24B1ST CD/DVD Burner
    PSU
    PC Power & Cooling 750W Quad EPS12V
    Case
    Cooler Master ATCS 840 Tower
    Cooling
    CM Hyper 212 EVO (push/pull)
    Keyboard
    Ducky DK9008 Shine II Blue LED
    Mouse
    Logitech Optical M-100
    Internet Speed
    300/300
    Browser
    Firefox (latest)
    Antivirus
    Bitdefender Internet Security
    Other Info
    Speakers: Klipsch Pro Media 2.1
  • Operating System
    Windows XP Pro 32bit w/SP3
    Computer type
    PC/Desktop
    Manufacturer/Model
    Built by Ghot® (not in use)
    CPU
    AMD Athlon 64 X2 5000+ (OC'd @ 3.2Ghz)
    Motherboard
    ASUS M2N32-SLI Deluxe Wireless Edition
    Memory
    TWIN2X2048-6400C4DHX (2 x 1GB, DDR2 800)
    Graphics card(s)
    EVGA 256-P2-N758-TR GeForce 8600GT SSC
    Sound Card
    Onboard
    Monitor(s) Displays
    ViewSonic G90FB Black 19" Professional (CRT)
    Screen Resolution
    up to 2048 x 1536
    Hard Drives
    WD 36GB 10,000rpm Raptor SATA
    Seagate 80GB 7200rpm SATA
    Lite-On LTR-52246S CD/RW
    Lite-On LH-18A1P CD/DVD Burner
    PSU
    PC Power & Cooling Silencer 750 Quad EPS12V
    Case
    Generic Beige case, 80mm fans
    Cooling
    ZALMAN 9500A 92mm CPU Cooler
    Mouse
    Logitech Optical M-BT96a
    Keyboard
    Logitech Classic Keybooard 200
    Internet Speed
    300/300
    Browser
    Firefox 3.x ??
    Antivirus
    Symantec (Norton)
    Other Info
    Still assembled, still runs. Haven't turned it on for 13 years?
Generally...

Only run SFC after a reboot, and when run after DISM... it will be slow.
Has nothing to do with the updates though.
I didn't run DISM before sfc. And it was after a reboot.
 

My Computer

System One

  • OS
    Windows Pro 11 22H2 Build 22621.1992
    Computer type
    PC/Desktop
    Manufacturer/Model
    Custom built
    CPU
    i5-12600K
    Motherboard
    Gigabyte Z690 UD DDR4
    Memory
    Transcend 16GB
    Graphics Card(s)
    Zotac 4070Ti Trinity
    Sound Card
    Internal: Realtek® ALC892 codec
    Monitor(s) Displays
    Asus VZ239-H
    Screen Resolution
    1080p
    Hard Drives
    Kingston 500GB nVME
    Case
    Fractal Focus 2 RGB White
    Cooling
    Xilence LQ240PRO Watercooling
    Browser
    Edge Chromium
I didn't run DISM before sfc. And it was after a reboot.



Well, occasionally it has problems to fix.
Run it again... see if it's still slow.
 

My Computers

System One System Two

  • OS
    Win 11 Home ♦♦♦22631.3737 ♦♦♦♦♦♦♦23H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    Built by Ghot® [May 2020]
    CPU
    AMD Ryzen 7 3700X
    Motherboard
    Asus Pro WS X570-ACE (BIOS 4702)
    Memory
    G.Skill (F4-3200C14D-16GTZKW)
    Graphics Card(s)
    EVGA RTX 2070 (08G-P4-2171-KR)
    Sound Card
    Realtek ALC1220P / ALC S1220A
    Monitor(s) Displays
    Dell U3011 30"
    Screen Resolution
    2560 x 1600
    Hard Drives
    2x Samsung 860 EVO 500GB,
    WD 4TB Black FZBX - SATA III,
    WD 8TB Black FZBX - SATA III,
    DRW-24B1ST CD/DVD Burner
    PSU
    PC Power & Cooling 750W Quad EPS12V
    Case
    Cooler Master ATCS 840 Tower
    Cooling
    CM Hyper 212 EVO (push/pull)
    Keyboard
    Ducky DK9008 Shine II Blue LED
    Mouse
    Logitech Optical M-100
    Internet Speed
    300/300
    Browser
    Firefox (latest)
    Antivirus
    Bitdefender Internet Security
    Other Info
    Speakers: Klipsch Pro Media 2.1
  • Operating System
    Windows XP Pro 32bit w/SP3
    Computer type
    PC/Desktop
    Manufacturer/Model
    Built by Ghot® (not in use)
    CPU
    AMD Athlon 64 X2 5000+ (OC'd @ 3.2Ghz)
    Motherboard
    ASUS M2N32-SLI Deluxe Wireless Edition
    Memory
    TWIN2X2048-6400C4DHX (2 x 1GB, DDR2 800)
    Graphics card(s)
    EVGA 256-P2-N758-TR GeForce 8600GT SSC
    Sound Card
    Onboard
    Monitor(s) Displays
    ViewSonic G90FB Black 19" Professional (CRT)
    Screen Resolution
    up to 2048 x 1536
    Hard Drives
    WD 36GB 10,000rpm Raptor SATA
    Seagate 80GB 7200rpm SATA
    Lite-On LTR-52246S CD/RW
    Lite-On LH-18A1P CD/DVD Burner
    PSU
    PC Power & Cooling Silencer 750 Quad EPS12V
    Case
    Generic Beige case, 80mm fans
    Cooling
    ZALMAN 9500A 92mm CPU Cooler
    Mouse
    Logitech Optical M-BT96a
    Keyboard
    Logitech Classic Keybooard 200
    Internet Speed
    300/300
    Browser
    Firefox 3.x ??
    Antivirus
    Symantec (Norton)
    Other Info
    Still assembled, still runs. Haven't turned it on for 13 years?
The speed time of scan and repair process will change depended on how many system files need to be repaired and how fast the Windows 11 installed storage device.
 

My Computer

System One

  • OS
    Windows 11
    Computer type
    PC/Desktop
    Manufacturer/Model
    HP Pavilion
    CPU
    AMD Ryzen 7 5700G
    Motherboard
    Erica6
    Memory
    Micron Technology DDR4-3200 16GB
    Graphics Card(s)
    NVIDIA GeForce RTX 3060
    Sound Card
    Realtek ALC671
    Monitor(s) Displays
    Samsung SyncMaster U28E590
    Screen Resolution
    3840 x 2160
    Hard Drives
    SAMSUNG MZVLQ1T0HALB-000H1

My Computer

System One

  • OS
    Windows 10
    Computer type
    Laptop
    Manufacturer/Model
    HP
    CPU
    Intel(R) Core(TM) i7-4800MQ CPU @ 2.70GHz
    Motherboard
    Product : 190A Version : KBC Version 94.56
    Memory
    16 GB Total: Manufacturer : Samsung MemoryType : DDR3 FormFactor : SODIMM Capacity : 8GB Speed : 1600
    Graphics Card(s)
    NVIDIA Quadro K3100M; Intel(R) HD Graphics 4600
    Sound Card
    IDT High Definition Audio CODEC; PNP Device ID HDAUDIO\FUNC_01&VEN_111D&DEV_76E0
    Hard Drives
    Model Hitachi HTS727575A9E364
    Antivirus
    Microsoft Defender
    Other Info
    Mobile Workstation
Is anyone else having this issue?
I don't have this issue. However, I run the following after each CU using Windows Terminal (Admin) - Command Prompt / Powershell - one command at a time -

rundll32.exe pnpclean.dll,RunDLL_PnpClean /drivers/maxclean
dism /Online /Cleanup-Image /CheckHealth
dism /Online /Cleanup-Image /ScanHealth
dism /Online /Cleanup-Image /RestoreHealth
dism /Online /Cleanup-Image /Startcomponentcleanup
sfc /scannow


This does take a long time; however it is very thorough and covers most issues.
 

My Computer

System One

  • OS
    Windows 11 Pro v 24H2 (Build 26100.863)
    Computer type
    PC/Desktop
    Manufacturer/Model
    Dell Precision 3660 Tower Workstation
    CPU
    12th Gen Intel(R) Core(TM) i9-12900 5.10 GHz
    Motherboard
    64-bit operating system, x64-based processor
    Memory
    32.00 GB
    Graphics Card(s)
    Intel UHD Graphics 770
    Sound Card
    Realtek Audio
    Monitor(s) Displays
    Dell P2714H Monitor
    Screen Resolution
    1920 x 1080
    Hard Drives
    1 x 512GB NVME PC801 NVMe SK hynix Boot
    1 x 1TB Seagate ST1000LM049-2GH172 Internal HDD
    1 x 1TB Seagate STGX4000400 External HDD
    1 x 2TB Seagate STGX4000400 External HDD
    1 x 4TB Seagate STGX4000400 External HDD
    PSU
    300 Watts
    Cooling
    Air
    Keyboard
    Microsoft Wired Keyboard 600
    Mouse
    Microsoft USB Basic Optical Mouse v2.0
    Browser
    Firefox
    Antivirus
    Windows Defender + Malwarebytes Premium
    Other Info
    BaseBoard Manufacturer Dell Inc.
    BaseBoard Product 0J1CP3
    BaseBoard Version A01
Yes i always do the updates first before running any programs or apps !
Chuck
 

My Computer

System One

  • OS
    Windows11 23H2 (OS Build 22631.2428)
    Computer type
    PC/Desktop
    Manufacturer/Model
    HP HP ENVY TE01
    CPU
    2.90 gigahertz Intel Core i7-10700
    Motherboard
    Board: HP 8767 A (SMVB)
    Memory
    16214 Megabytes Usable Installed Memor
    Hard Drives
    1511.52 Gigabytes Usable Hard Drive Capacity
    1418.15 Gigabytes Hard Drive Free Space
    Keyboard
    Logitech wireless
    Mouse
    M 185 wireless
    Internet Speed
    12 ms Jitter 8 ms Download 10.5 Mbps Upload 1.7
    Browser
    Edge & FF
    Antivirus
    Windows Defender
After installing May's Cumulative Updates including the Preview (now at build 22000.708) I noticed the sfc /scannow takes a lot of time to complete. The first time it successfully repaired files but even the 2nd scan is very slow. It wasn't like this before

Is anyone else having this issue?
"very slow" is subjective. How long does it actually take to complete? You could roll back the update and see it that makes a change and then wait for the June update to see if the problem is corrected.
 

My Computer

System One

  • OS
    Windows 11 Professional
    Computer type
    PC/Desktop
    Manufacturer/Model
    Microcenter B677
    CPU
    Intel Core i5-9400
    Motherboard
    ASRock H310CM-HDV/M.2
    Memory
    32GB
    Graphics Card(s)
    Integrated Intel UHD Graphics 630
    Sound Card
    Intel Kaby Lake - High Definition Audio / cAVS (Audio, Voice, Speech) [A0]
    Monitor(s) Displays
    LG Model: GSM59F1
    Screen Resolution
    2560x1080
    Case
    Lian Li 205M
    Antivirus
    Kaspersky AV

My Computer

System One

  • OS
    Windows 10
    Computer type
    Laptop
    Manufacturer/Model
    HP
    CPU
    Intel(R) Core(TM) i7-4800MQ CPU @ 2.70GHz
    Motherboard
    Product : 190A Version : KBC Version 94.56
    Memory
    16 GB Total: Manufacturer : Samsung MemoryType : DDR3 FormFactor : SODIMM Capacity : 8GB Speed : 1600
    Graphics Card(s)
    NVIDIA Quadro K3100M; Intel(R) HD Graphics 4600
    Sound Card
    IDT High Definition Audio CODEC; PNP Device ID HDAUDIO\FUNC_01&VEN_111D&DEV_76E0
    Hard Drives
    Model Hitachi HTS727575A9E364
    Antivirus
    Microsoft Defender
    Other Info
    Mobile Workstation
There is a timer on the script in post #8.
My general rule of thumb is not to run batch files posted in forums. Therefore, I have no information on the "very slow" comment.
 

My Computer

System One

  • OS
    Windows 11 Professional
    Computer type
    PC/Desktop
    Manufacturer/Model
    Microcenter B677
    CPU
    Intel Core i5-9400
    Motherboard
    ASRock H310CM-HDV/M.2
    Memory
    32GB
    Graphics Card(s)
    Integrated Intel UHD Graphics 630
    Sound Card
    Intel Kaby Lake - High Definition Audio / cAVS (Audio, Voice, Speech) [A0]
    Monitor(s) Displays
    LG Model: GSM59F1
    Screen Resolution
    2560x1080
    Case
    Lian Li 205M
    Antivirus
    Kaspersky AV

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