top of page

Professional Group

Public·27 members

Could Not Load Required File Winsetup Dll 0xc1

Could Not Load Required File Winsetup Dll 0xc1

If you are trying to upgrade your Windows operating system, you may encounter an error message that says: "Windows could not load required file winsetup.dll. The file may be corrupt. To install Windows, restart the installation. Error code 0xC1." This error can prevent you from completing the installation and cause frustration. In this article, we will explain what causes this error and how to fix it.

What is winsetup.dll?

Winsetup.dll is a dynamic link library (DLL) file that is part of the Windows Setup program. It contains functions and resources that are used to install, repair, or upgrade Windows. It is located in the sources folder of the installation media, such as a DVD or a USB drive.


What causes the error code 0xC1?

The error code 0xC1 indicates that the winsetup.dll file is missing, corrupted, or incompatible with your current version of Windows. This can happen due to various reasons, such as:

  • The installation media is damaged or defective.

  • The installation media is not compatible with your computer's hardware or software configuration.

  • The installation media is infected by a virus or malware.

  • The winsetup.dll file is deleted, overwritten, or modified by another program.

  • The registry entries related to winsetup.dll are corrupted or invalid.

How to fix the error code 0xC1?

Depending on the cause of the error, there are different solutions that you can try to fix the error code 0xC1. Here are some of the most common ones:

  • Check the installation media. Make sure that the installation media is not scratched, cracked, or dirty. If you are using a DVD, try cleaning it with a soft cloth. If you are using a USB drive, try plugging it into another port or using another USB drive. You can also try creating a new installation media using the [Media Creation Tool] from Microsoft.

  • Run a virus scan. It is possible that your installation media or your computer is infected by a virus or malware that interferes with the winsetup.dll file. To remove any potential threats, run a full scan of your system using a reliable antivirus program. You can also use the [Windows Defender Offline] tool to scan your system before booting into Windows.

Repair the winsetup.dll file. If the winsetup.dll file is corrupted or modified, you can try to repair it using the [System File Checker] tool. This tool scans and restores any missing or corrupted system files, including winsetup.dll. To run this tool, follow these steps:

  • Insert the installation media into your computer and boot from it.

  • Select your language, time, and keyboard preferences and click Next.

  • Click Repair your computer at the bottom left corner of the screen.

  • Select Troubleshoot and then Command Prompt.

  • Type sfc /scannow and press Enter. This will scan and repair any corrupted system files.

  • When the scan is complete, type exit and press Enter to close the Command Prompt.

  • Restart your computer and try to install Windows again.

  • Update your drivers and BIOS. Sometimes, the error code 0xC1 can be caused by outdated or incompatible drivers or BIOS settings. To ensure that your hardware and software are compatible with the installation media, you should update your drivers and BIOS to the latest versions. You can use the [Device Manager] tool to update your drivers or visit your computer manufacturer's website to download and install the latest BIOS update for your model.

  • Clean the registry. The registry is a database that stores information and settings for your system and programs. If the registry entries related to winsetup.dll are corrupted or invalid, they can cause the error code 0xC1. To fix this issue, you can use a [registry cleaner] program to scan and repair any errors in your registry. However, you should be careful when using such programs, as they can also delete important entries that are needed for your system to function properly. You should always backup your registry before making any changes to it.


The error code 0xC1 is a common problem that can occur when you try to install, repair, or upgrade Windows. It means that the winsetup.dll file is missing, corrupted, or incompatible with your system. To fix this error, you can try the solutions mentioned above, such as checking the installation media, running a virus scan, repairing the winsetup.dll file, updating your drivers and BIOS, or cleaning the registry. If none of these solutions work, you may need to contact Microsoft support or a professional technician for further assistance.


Welcome to the group! You can connect with other members, ge...


bottom of page