How to clean found computer

Allen Kasper 0 Reputation points
2026-10-29T16:53:12.7233333+00:00

Found a Dell laptop in a storage unit I bought and want to clean it but don't have password...can you help

Windows for home | Windows 10 | Windows Hello, lock screen and sign-in
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  1. AI answer

    2026-10-29T16:53:56.1233333+00:00

    Perform a clean installation from a bootable Windows USB to erase the previous owner’s files, accounts, apps, and settings without attempting to bypass their password.

    Warning: This permanently deletes everything on the laptop. First ensure the storage-unit sale legally transferred the computer to you and that it does not need to be returned.

    1. Create the Windows installation USB

    On another working Windows PC:

    1. Insert a blank USB flash drive with at least 8 GB. Its existing contents will be erased.
    2. Open Microsoft’s Download Windows 10 page.
    3. Under Create Windows 10 Installation Media, select Download Now.
    4. Run MediaCreationTool.exe.
    5. Select Create installation media for another PC, choose the USB drive, and let the tool finish. ^1^

    2. Start the Dell from the USB

    1. Shut down the Dell and connect the USB.
    2. Turn it on and open its one-time boot menu.
    3. Select the USB device in UEFI mode.

    The exact boot-menu key varies by Dell model, so consult the model’s Dell documentation if the menu does not appear. If a BIOS/firmware password prevents USB booting, do not try to circumvent it; contact Dell and provide proof of ownership.

    3. Erase the drive and reinstall Windows

    In Windows Setup:

    1. Select the language and keyboard options.
    2. Choose the option to install Windows.
    3. If asked for a product key, select I don’t have a product key. Many modern computers have a key stored in firmware, which Setup applies automatically when the installed Windows edition matches it. ^1^
    4. If prompted to choose an edition, select the edition previously licensed on the laptop—typically Home or Pro. The edition must match the digital licence.
    5. At the drive-selection screen, delete every partition on Disk 0 until only Disk 0 Unallocated Space remains.
    6. Do not delete anything on Disk 1 or another disk if multiple physical drives are listed.
    7. Select Disk 0 Unallocated Space, then select Next/Install.
    8. After several restarts, complete setup with your own account and password.

    Microsoft documents that a clean installation removes personal files, apps, manufacturer customizations, and settings. Windows normally activates after the computer connects to the internet, provided the correct licensed edition was installed. ^2^

    Windows 10 support status

    Windows 10 support ended on October 14, 2025, so it no longer receives free security fixes. If this Dell meets Windows 11 requirements, install Windows 11 instead; otherwise, continuing with Windows 10 carries an increasing security risk. ^1^

    References

    1. Windows 10 (#tab/windows-10)
    2. Reinstall Windows with the installation media | Microsoft Support
    AI-generated content may be incorrect. Read our transparency notes for more information.

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  2. DaveM121 945.9K Reputation points Independent Advisor
    2026-10-29T17:29:18.6+00:00

    1

    Try using this process to access the Recovery Environment and perform a Windows Reset while selecting to 'Keep Nothing'.

    Start the laptop, just as Windows attempts to load (spinning dots), press and hold Power Button for 5 - 10 seconds to perform a Hard Shut Down

    Do this twice

    On the third start Windows will boot into the Recovery Environment and from there you can access System Repair, Safe Mode, Command Prompt... etc.

    Go to Troubleshoot - Advanced Options - Reset this PC

    Choose to keep nothing

    Then start the Reset.

    2

    If that process is not successful, you will need to create a bootable Windows 10 USB on an empty 8GB USB flash drive, then boot the laptop form the USB and use that to wipe the drive and clean install Windows 10.

    Click this link:  https://www.microsoft.com/software-download/windows10

    to download the Media Creation Tool (Click on Download Tool Now), with that you can create a bootable USB flash drive (min 8GB) using that tool

    Then, boot the laptop from the Installation Media you just created to begin installing Windows 10

    During the installation process skip the steps which ask for a product key and select the option 'I am Reinstalling Windows 10 on this PC'

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