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
    2017-12-21T17:21:37+00:00

    This worked like a charm & now upgraded from Windows 7 32-bit to Windows 10 32-bit - with NO apparent issues.

    Question: Since I replaced the wimgapi.dll that came with Windows 10 with the Windows 7 version of it, should I go and put the Windows 10 version of wimgapi.dll In System32 folder? If so, I no longer have the Windows 10 version of wimgapi.dll and wondering where to get it.

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  2. Anonymous
    2017-12-21T03:12:30+00:00

    I have moved onto another task and haven’t tried but will tomorrow. Thanks!

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  3. Anonymous
    2017-12-20T22:12:39+00:00

    Sorry, I guessed at the date. My point was it was older. Might depend on your system too. Whatever it worked nicely. Too bad you can't depend on MS for a clean upgrade.

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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
    2017-12-20T18:09:49+00:00

    So you all have the exact instructions I used, here is a copy.

    I had the same "api-ms-win-core-libraryloader-l1-1-1.dll" missing issue when upgrading Windows 7 to Windows 10 and finally I saw your post and tried fixing the problem by "Replacing C:\Windows10Upgrade\wimgapi.dll with the one from C:\Windows\System32\wimgapi.dll". It works. The Windows 10 upgrade is in progress.

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