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Partition table repair error code 0x490 windows 10

Craig Crawford 0 Reputation points
2025-05-05T22:09:10.7266667+00:00

My Windows 10 laptop wont boot up and when I check the log files it shows the startup repair failed: Error code= 0x490. I have tried all the usual repair advice:

chkdsk /f, bootrec /fixmbr, bootsect/nt60 sys, bootrec /fixboot, bootrec /rebuildbcd etc.

Windows 10 Setup
Windows 10 Setup
Windows 10: A Microsoft operating system that runs on personal computers and tablets.Setup: The procedures involved in preparing a software program or application to operate within a computer or mobile device.
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  1. S.Sengupta 23,536 Reputation points MVP
    2025-05-06T01:04:32.78+00:00

    As you have tried all the usual repair methods but filed. I shall suggest you to:

    Use a Linux Live USB to copy off your data.

    Use Windows 10 install media and choose Clean install.

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  2. Smith Pham 0 Reputation points
    2025-05-07T07:59:44.7466667+00:00

    Dear Craig.

    Here is the answer:

    1. Boot from your Windows 10 installation media (USB/DVD).
    2. Choose Repair your computer > Troubleshoot > Command Prompt.
    3. Run:Copy
       diskpart

    list disk select disk 0 list partition

    Copy

       
1. Identify the **System Reserved** (usually 100MB–500MB) or the partition where Windows is installed.

1. Set it active:

    select partition <#> active exit

    Copy

       
1. Reboot and test.
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