File History stopped working after Sept. 8th


jmcrVail

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Member
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2
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Windows 11
I have a Sandisk 4TB SSD attached to my laptop computer. I has been keeping the file history for years. No, it is not full. There is 2.91 TB free of 3.63 TB.
When I turn off the computer, and then turn it on, the SSD is locked and I run a process to unlock it. It appears as the"F" drive.
Up through 9/8, I could open File History, and see the SSD and simply click the RUN button to activate it.
NOW I see the heading "File History is OFF", below that is the SSD, below that there is no RUN button (like there used to be), there is a checkbox preceeding the sentence "I want to use a previous backup on this File History drive." I check that box.
Below that is a new box with the heading "Select an existing backup:" inside the box, I see my User Name, the computer name and the last backup date of 9/8/26 5:12pm. I can click on the line to highlight it in blue and a "TURN ON" button, on the right, becomes active between the 2 boxes. I click on it and NOTHING HAPPENS.
Can anyone help me?
 

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Hello @jmcrVail and welcome to Eleven Forum.

Here's ten points just for filling out your computer specs. :-)






Here's some things that you may find useful...



 

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There is a bug in KB5124008 causing File History to stop working, a subsequent KB5129195 (26200.9457) out of schedule update did not fix it.

You can try uninstalling KB5124008 or wait until it is fixed.
 

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Windows 11
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Thank You! both for your replies. Unfortunately I reviewed my Windows Update History and KB5124008 is NOT installed. I have KB5126052 installed on 9/8 and KB5129195 installed 9/15, which I read does not fix the problem.
 

My Computer My Computer

At a glance

Windows 11Intel Core i7-8550U16GBIntel UHD Graphics 620
OS
Windows 11
Computer type
Laptop
Manufacturer/Model
Dell Inspiron 7573
CPU
Intel Core i7-8550U
Motherboard
Intel Serial IO 12C Host Controller 9D60
Memory
16GB
Graphics Card(s)
Intel UHD Graphics 620
Sound Card
Realtek
Monitor(s) Displays
Dell Internal Display & Samsung S27D360 via HDMI
Screen Resolution
1920 x 1080
Hard Drives
Samsung SSD PMB871b M.2 2280 512GB
Keyboard
Logitech
Mouse
Logitech
Browser
Google or Duck, Duck, Go
Antivirus
Windows Defender
File History for some has been broken for a while, with reports on various failures...

March (KB5079473)

July (KB5101684)

September (KB5124008)

You may want to consider another method of backing up frequently changing data.
 

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Toshiba
It's a bug due to typical poor software QA by MS
 

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I should have been more accurate, it was either KB51240008 or KB5126052, however same applies.

The dates should roughly match with when File History stopped.
 

My Computer My Computer

At a glance

Windows 11
OS
Windows 11
I reviewed my Windows Update History and KB5124008 is NOT installed. I have KB5126052 installed on 9/8 and KB5129195 installed 9/15, which I read does not fix the problem.
Updates are cumulative. Your KB5129195 included the broken code from KB5124008.
 

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    AMD Athlon Silver 3050U
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    8GB
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    laptop screen
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    1366x768 native resolution, up to 2560x1440 with Radeon Virtual Super Resolution
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    1TB Samsung EVO 870 SSD (from April 2026: 250GB EVO 850)
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    Edge, Firefox
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    I've now clean installed 25H2 and used Garlin's scripts to update Secure Boot to CA 2023 and revoke the PCA 2011 certificates. It's new role is to test secure boot issues.

    Info for 2021-2026:
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    In-place upgrade to 22H2 using ISO and a workaround.
    Feature Update to 23H2 by manually installing the Enablement Package.
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    Upgraded to 25H2 by Enablement Package.

    Also running Insider Experimental 263xx and 29xxx builds and Windows 10 as native boot .vhdx.
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    My SYSTEM EIGHT is a 2-in-1 convertible Lenovo Yoga 11e (5th gen) type 20LN, Celeron N4120, 8GB RAM, 512GB NVMe ssd, a supported device for Windows 11. Currently running Windows 11 Pro, plus Insider Beta, Experimental 263xx and 29xxx builds as native boot vhdx.
I have KB5126052 installed on 9/8 and KB5129195 installed 9/15, which I read does not fix the problem.
The Preview update KB5124010 is suppose to have a fix for File History.

[File History] This update addresses an issue where File History might fail to back up or restore files to an external drive or network location. Affected devices might incorrectly display a “Reconnect your drive” message even when a compatible backup drive is connected and working properly.
 

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    Windows 11 HomeAMD Athlon Silver 3050U8GBRadeon Graphics
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    Acer Aspire 3 A315-23-R9VY
    CPU
    AMD Athlon Silver 3050U
    Memory
    8GB
    Graphics Card(s)
    Radeon Graphics
    Monitor(s) Displays
    laptop screen
    Screen Resolution
    1366x768 native resolution, up to 2560x1440 with Radeon Virtual Super Resolution
    Hard Drives
    1TB Samsung EVO 870 SSD (from April 2026: 250GB EVO 850)
    Internet Speed
    150 Mbps
    Browser
    Edge, Firefox
    Antivirus
    Defender
    Other Info
    UPDATE - 11 April 2026: due to lid hinges starting to break up this laptop has been retired from active duty. The OS with all software and files has been migrated to my System Seven in 'Other systems' to carry on as my general purpose 'main machine'.

    I've now clean installed 25H2 and used Garlin's scripts to update Secure Boot to CA 2023 and revoke the PCA 2011 certificates. It's new role is to test secure boot issues.

    Info for 2021-2026:
    fully 'Windows 11 ready' laptop. Windows 10 C: partition migrated from my old unsupported 'main machine' then upgraded to 11. A test migration ran Insider builds for 2 months. When 11 was released on 5th October 2021 it was re-imaged back to 10 and was offered the upgrade in Windows Update on 20th October. Windows Update offered the 22H2 Feature Update on 20th September 2022. It got the 23H2 Feature Update on 4th November 2023 through Windows Update, 24H2 on 3rd October 2024 through Windows Update by setting the Target Release Version for 24H2, and 25H2 on 30th September 2025 through Windows Update by setting the Target Release Version for 25H2.
  • At a glance

    Windows 11 ProIntel® Core™ i5-520M8GB(integrated graphics) Intel HD Graphics
    Operating System
    Windows 11 Pro
    Computer type
    Laptop
    Manufacturer/Model
    Dell Latitude E4310
    CPU
    Intel® Core™ i5-520M
    Motherboard
    0T6M8G
    Memory
    8GB
    Graphics card(s)
    (integrated graphics) Intel HD Graphics
    Screen Resolution
    1366x768
    Hard Drives
    500GB Crucial MX500 SSD
    Browser
    Firefox, Edge
    Antivirus
    Defender
    Other Info
    unsupported machine: Legacy bios, MBR, TPM 1.2, upgraded from W10 to W11 using W10/W11 hybrid install media workaround.

    In-place upgrade to 22H2 using ISO and a workaround.
    Feature Update to 23H2 by manually installing the Enablement Package.
    In-place upgrade to 24H2 using hybrid 23H2/24H2 install media.
    Upgraded to 25H2 by Enablement Package.

    Also running Insider Experimental 263xx and 29xxx builds and Windows 10 as native boot .vhdx.
  • My SYSTEM THREE is a Dell Latitude 5410, i7-10610U, 32GB RAM, 512GB NVMe ssd, supported device running Windows 11 Pro.

    My SYSTEM FOUR was a 2-in-1 convertible Lenovo Yoga 11e (1st gen) type 20DA, Celeron N2930, 8GB RAM, 256GB ssd. Unsupported device. This has now been sold. It has been replaced by my System Eight.

    My SYSTEM FIVE is a Dell Latitude 3190 2-in-1, Pentium Silver N5030, 8GB RAM, 1TB NVMe ssd, supported device running Windows 11 Pro, plus Insider Beta, Experimental 263xx and 29xxx builds (and a few others) as a native boot .vhdx.

    My SYSTEM SIX is a Dell Latitude 5550, Core Ultra 7 165H, 64GB RAM, 1TB NVMe SSD, supported device, Windows 11 Pro, Hyper-V host machine. Updated to 25H2 on 30th September 2025.

    My SYSTEM SEVEN is a Lenovo Thinkpad T580, 1920x1080 touchscreen, Intel Core i7-8650U, 16GB RAM, 512GB NVMe SSD + 2nd 512GB NVMe SSD, a supported device for Windows 11. This is my current general purpose 'main machine'. The installed Windows 11 Home from my System One has been migrated to this machine. As its new home has an existing digital licence for Pro I've been able to upgrade the migrated OS from Home to Pro.

    My SYSTEM EIGHT is a 2-in-1 convertible Lenovo Yoga 11e (5th gen) type 20LN, Celeron N4120, 8GB RAM, 512GB NVMe ssd, a supported device for Windows 11. Currently running Windows 11 Pro, plus Insider Beta, Experimental 263xx and 29xxx builds as native boot vhdx.
The Preview update KB5124010 is suppose to have a fix for File History.
And potentially break more stuff...

I would test it on a VM before committing it to a daily driver.
 

My Computer My Computer

At a glance

Windows 11 Pro 25H2
OS
Windows 11 Pro 25H2
Computer type
Laptop
Manufacturer/Model
Toshiba

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