How To Fix Windows Could Not Load Required File Winsetup.dll -

If the error occurs during a (e.g., upgrading from Windows 10 to 11), background apps are interfering.

The motherboard firmware cannot properly communicate with the installation media or hardware components.

Bad sectors on your hard drive or unstable RAM can prevent the system from reading the file correctly. Step-by-Step Fixes 1. Recreate Your Installation Media (Most Effective)

Restart your PC and repeatedly press the BIOS key (usually , F12 , Del , or Esc ).

Type chkdsk C: /f (replace C: with your drive letter) and press . how to fix windows could not load required file winsetup.dll

This comprehensive guide covers why this error happens and provides step-by-step solutions to fix it. What Causes the Winsetup.dll Error?

A faulty memory stick can cause data to "drop" while the installer is loading files into the system's temporary memory.

If you are using a USB drive, it is possible that data was corrupted during the creation process.

Copy the update file onto a FAT32-formatted USB drive. If the error occurs during a (e

: Sometimes a specific port (like USB 3.0) can cause driver issues during setup. Try a USB 2.0 port or a different flash drive.

A large majority of winsetup.dll errors are caused by a corrupted write process when creating the installation media.

If the media is new and the BIOS is correct, the computer may be losing connection with the hard drive or the installation media during the file copy process.

Last updated: May 2026. For Windows 10, Windows 11, and Windows Server 2022/2025 installations. Step-by-Step Fixes 1

How to Fix "Windows Could Not Load Required File WinSetup.dll" (0x80070002)

Sometimes, the SATA configuration in your BIOS/UEFI prevents Windows from reading the drive correctly. Restart your computer and enter BIOS. Look for or Storage Configuration .

Third-party antivirus (Avast, McAfee, Norton) sometimes quarantines winsetup.dll as a false positive, especially from custom Windows ISOs.