Fix Error Code 126 Instantly to Resolve Failed to Load Custom.dll from the list Issue

Ultimate Guide to Fixing Schedule I Error Code 126: No More Custom.dll Problems!

Problem Description

Error code 126, “Failed to load custom.dll,” appears when attempting to run Schedule I software or similar applications. This issue often arises due to antivirus software blocking the custom.dll file or improper installation of the game/software files. The error prevents the program from functioning correctly, leaving users frustrated and unable to proceed.

Solution

Follow these steps to resolve the issue. Each step includes clear instructions and troubleshooting tips.

Step 1: Check Windows Security Protection History

1. Open Windows Security by typing “Windows Security” into the search bar and selecting it.
2. Navigate to Protection History from the left-hand menu.
3. Look for any blocked files related to custom.dll.
4. If you find the file listed:
   • Click the down arrow next to the file name.
   • Select Allow on Device to unblock it.

Step 2: Add an Exclusion in Windows Security

Prevent future blockage of the custom.dll file by adding an exclusion:

1. Go back to Windows Security and click on Virus & Threat Protection.
2. Select Manage Settings under Virus & Threat Protection Settings.
3. Scroll down and click Add or Remove Exclusions.
4. Choose Add an Exclusion, then select Folder from the dropdown menu.
5. Navigate to the directory where your game/software is installed (e.g., F:\GameFolder) and add it as an exclusion.

Step 3: Re-download and Replace Missing Files

If custom.dll is not listed in Protection History, it may be missing or corrupted:

1. Re-download the zip folder containing your game/software files from a trusted source.
2. Turn off Real-Time Protection temporarily in Windows Security: Open Windows Security > Virus & Threat Protection > Manage Settings > toggle off Real-Time Protection.
3. Extract the zip folder again using a tool like WinRAR or 7-Zip.
4. Locate the custom.dll file within the extracted folder (e.g., ScheduleI\custom.dll).

Step 4: Copy and Paste custom.dll File

1. Right-click on custom.dll and select Copy.
2. Navigate to your game/software installation directory (e.g., F:\GameFolder).
3. Paste the copied file into this directory, overwriting any existing version.

Step 5: Test the Program

1. Launch your program/game after completing all steps above.
2. Ensure that you’ve added an exclusion for the installation folder in Windows Security (Step 2).

Additional Tips

• If antivirus software continues blocking files, consider temporarily disabling third-party antivirus programs while launching your application.
• Always download files from official or verified sources to avoid malware risks.
• Regularly update your antivirus definitions and software patches for compatibility improvements.

Fixing Error Code 126, “Failed to load custom.dll,” involves unblocking files in Windows Security, adding exclusions, and ensuring proper file placement in your installation directory. Following these steps systematically will resolve the issue and prevent future occurrences.