How to Fix Could Not Load Required File Winsetup Dll 0xc1 Error
If you are trying to install Windows 10 on your PC and encounter the error message \"Could not load required file Winsetup.dll. The file may be corrupt. To install Windows, restart the installation. Error code: 0xC1\", you are not alone. Many users have reported this issue when using the Windows Media Creation Tool or a bootable USB drive to create installation media.
This error can be caused by various factors, such as a corrupted or incomplete ISO file, a faulty USB drive, a damaged Winsetup.dll file, or a compatibility issue with your system. Fortunately, there are some possible solutions that you can try to fix this error and install Windows 10 successfully.
Solution 1: Download a New ISO File
One of the most common reasons for this error is a corrupted or incomplete ISO file that you downloaded from the Windows Media Creation Tool or other sources. To rule out this possibility, you can try to download a new ISO file from a reliable source and use it to create installation media.
One of the sources that you can use is Adguard, a third-party web service that allows you to download Microsoft Windows and Microsoft Office ISO images directly from the Microsoft servers. Adguard is totally safe and is used by many users and MVPs. You can follow these steps to download a new ISO file from Adguard:
Go to https://tb.rg-adguard.net/public.php and select the product type, version, edition, language, and architecture of Windows 10 that you want to download.
Click on the Download button next to the ISO file that matches your preferences.
Save the ISO file to your PC and verify its integrity using a tool like HashMyFiles.
Use a tool like Rufus to create a bootable USB drive from the ISO file.
Boot your PC from the USB drive and try to install Windows 10 again.
Solution 2: Use a Different USB Drive
Another possible reason for this error is a faulty USB drive that contains bad sectors or errors. To eliminate this possibility, you can try to use a different USB drive to create installation media and see if that works.
You can also check and repair your USB drive using these steps:
Connect your USB drive to your PC and open File Explorer.
Right-click on your USB drive and select Properties.
Go to the Tools tab and click on Check under Error checking.
Click on Scan and repair drive and follow the instructions.
Eject your USB drive and try to install Windows 10 again.
Solution 3: Replace Winsetup.dll File
The Winsetup.dll file is an essential component of the Windows installation process. If this file is damaged or missing, you may encounter this error when trying to install Windows 10. To fix this issue, you can try to replace the Winsetup.dll file with a new one from a trusted source.
You can follow these steps to replace Winsetup.dll file:
Go to https://www.dll-files.com/winsetup.dll.html and download the Winsetup.dll file that matches your system architecture (32-bit or 64-bit).
Extract the Winsetup.dll file from the ZIP archive and copy it to your USB drive.
Boot your PC from the USB drive and press Shift + F10 to open Command Prompt.
Type cd /d X:\\sources and hit Enter, where X is the letter of your USB drive.
Type ren winsetup.dll winsetup.old and hit Enter to rename the original Winsetup.dll file.
Type copy X:\\winsetup.dll X:\\sources\\winsetup.dll and hit Enter to copy the new Winsetup.dll file 29c81ba772