DISM is a command-line tool that services and prepares Windows images, including the Windows Recovery Environment and Windows Setup. This tool is generally considered more powerful than SFC and should be run before SFC if the Windows component store is corrupted.
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Alternative: Run from a bootable USB to check your memory health thoroughly. Method 4: Clean the Target Hard Drive via Command Prompt
Swap your USB flash drive for a completely different one (at least 8GB in size) to rule out hardware degradation. 3. Flash the ISO Correctly Using Rufus
Are you installing on a or an older laptop? Share public link how to fix windows could not load required file winsetup.dll
Type exit , close the Command Prompt, and proceed with a clean Windows installation on the unallocated space. Conclusion
Most commonly, this error occurs because the installation media you are using is corrupted or incomplete. Common triggers include: Corrupted USB/DVD: A faulty flash drive or a "bad burn" of an ISO file. Failed Downloads:
Instead of the standard tool, use Rufus to create a bootable USB, as it often handles partition schemes (GPT vs. MBR) more reliably. 2. Repair System Files (If Upgrade is Failing)
On the Windows Setup screen, press to launch Command Prompt. Type diskpart and press Enter. DISM is a command-line tool that services and
Occasionally, overzealous antivirus software flags .dll files during the download process, stripping them from the package. Disable it temporarily while downloading and "burning" the image. ⚙️ Method 3: Reset BIOS/UEFI Settings
If the drive you are installing onto has bad sectors, the installer may fail to load winsetup.dll into memory. Boot from your installation USB. On the initial setup screen, press Shift + F10 to open the Command Prompt. chkdsk C: /f /r . (Replace with your target drive letter if different).
Download a fresh copy of Windows using the Microsoft Media Creation Tool .
: Plug your USB drive into a USB 2.0 port (usually black) instead of a USB 3.0 port (blue). Modern setup files occasionally lack the necessary USB 3.0 drivers during the initial boot phase. Method 4: Clean the Target Hard Drive via
If you must use a third-party tool like Rufus , ensure you select the correct target system settings (e.g., GPT partition scheme for modern UEFI systems, or MBR for older Legacy BIOS systems). 2. Switch to a Different USB Port (Prefer USB 2.0)
How to Fix "Windows Could Not Load Required File Winsetup.dll" (2026 Guide)
The USB flash drive or DVD used for installation has bad sectors or data corruption.
: Ensure the setup has permission to access temporary files. Right-click your Temp folder AppData\Local , and ensure "Everyone" has Full Control sfc /scannow