missing api-ms-win-core-libraryloader-l1-1-1.dll preventing me from upgrading to windows 10

Anonymous
2017-12-19T17:27:14+00:00

I'm currently on windows 7 and whenever I run Windows 10 upgrade assistant it gets to 99 then tells me I'm missing api-ms-win-core-libraryloader-l1-1-1.dll. I've tried running it on a clean boot, I've ran system cleanups to repair any corrupt files, I tried removing my antivirus, and still it won't work.

Does anyone have any other methods to fix so I can upgrade? any help appreciated!

Windows for home | Previous Windows versions | Install and upgrade

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  1. Anonymous
    2017-12-20T14:58:55+00:00

    Disclaimer: this worked for me. I can't ensure it'll work for you.

    Alright guys I used a different approach which doesn't involve windows 10 update assistant. You're gonna need to boot the installer from a flash drive using the media creation tool(just look this up, there a guide on Microsoft's forum with a download). After getting it on the flash drive I removed my antivirus, disabled my internet, and restarted after a clean boot. I then just ran the installer off the flash drive.

    Hope this works for you.

    that's how I got around it as well.

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  2. Anonymous
    2017-12-19T23:20:51+00:00

    Same problem here.

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  3. Anonymous
    2017-12-20T14:27:51+00:00

    Disclaimer: this worked for me. I can't ensure it'll work for you.

    Alright guys I used a different approach which doesn't involve windows 10 update assistant. You're gonna need to boot the installer from a flash drive using the media creation tool(just look this up, there a guide on Microsoft's forum with a download). After getting it on the flash drive I removed my antivirus, disabled my internet, and restarted after a clean boot. I then just ran the installer off the flash drive.

    Hope this works for you.

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    8 people found this answer helpful.
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  4. Anonymous
    2017-12-20T21:13:50+00:00

    Thanks, this worked for me as well.  The only difference is that the System32 wimgapi.dll date is 7/13/2009.

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  5. Anonymous
    2017-12-20T02:22:06+00:00

    not that I have seen online. this seems to be a recent problem or at lease the posts I have read are recent. no response from MS I have seen.

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