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I ran a Windows update 3 days ago. Now Drive C is full

Brooks Cottle 0 Reputation points
2026-03-07T23:47:18.6833333+00:00

I ran a Windows update 3 days ago. Before that my Drive C 929GB was only about 1/4 full. Ever since the Windows 2026-02 preview update installed 3/4/26, it's basically completely completely full, showing 2.17GB free of 929GB

Windows for home | Windows 11 | Windows update

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  1. John Jefferson Doyon 65,415 Reputation points Independent Advisor
    2026-03-08T00:35:26.7166667+00:00

    Hi, I'm John!

    A normal Windows update should not fill hundreds of GB of space, so something else may be using the storage.

    First, let's confirm what is actually taking the space.

    Please check this:

    • Go to Settings > System > Storage.
    • Wait for it to calculate.
    • What category is using the most space? (Apps, Temporary files, System & reserved, Other, etc.)

    Also check this:

    • Open File Explorer.
    • Go to This PC.
    • Right-click Local Disk (C:) > Properties.

    Does it also show only about 2 GB free, or is the number different there?

    Click "Add comment" to let me know.

    Regards,

    John J.D.

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