How to fix :adp error code 100 ?

Instructions for Fixing Errors: ADP Error Code 100


ADP is a popular payroll and HR management software used by many businesses. However, like any software, it can encounter errors that can cause inconvenience and frustration for users. One such error is ADP Error Code 100. This error can occur due to various reasons, including incorrect login credentials, network issues, or server problems. In this article, we will provide you with step-by-step instructions on how to fix ADP Error Code 100.

Step 1: Check Your Login Credentials

The first thing you should do when encountering ADP Error Code 100 is to check your login credentials. Make sure that you are entering the correct username and password. If you are unsure about your login credentials, you can reset your password by clicking on the “Forgot Password” link on the login page. Follow the instructions provided to reset your password.


Make sure that your password is strong and contains a combination of uppercase and lowercase letters, numbers, and special characters. This will help prevent unauthorized access to your account.

Step 2: Check Your Network Connection

If you are sure that your login credentials are correct, the next thing you should do is check your network connection. ADP requires a stable internet connection to function properly. If your internet connection is unstable or slow, it can cause ADP Error Code 100. To check your network connection, try accessing other websites or applications. If you are unable to access other websites or applications, it is likely that your network connection is the issue.

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Try resetting your router or modem to see if it resolves the issue. You can also try connecting to a different network to see if the issue persists.

Step 3: Clear Your Browser Cache and Cookies

If your login credentials and network connection are not the issue, the next thing you should do is clear your browser cache and cookies. Over time, your browser cache and cookies can accumulate and cause issues with websites and applications. To clear your browser cache and cookies, follow the instructions below:

1. Open your browser and click on the three dots in the top right corner.
2. Click on “Settings” and then “Privacy and Security”.
3. Click on “Clear Browsing Data” and select “Cached Images and Files” and “Cookies and Other Site Data”.
4. Click on “Clear Data” to clear your browser cache and cookies.


Make sure that you only clear your browser cache and cookies and not your browsing history. Clearing your browsing history can cause you to lose important information such as saved passwords and form data.

Step 4: Contact ADP Support

If none of the above steps resolve ADP Error Code 100, the issue may be with ADP’s servers. In this case, you should contact ADP support for assistance. ADP support can help you diagnose and resolve the issue. To contact ADP support, follow the instructions below:

1. Log in to your ADP account.
2. Click on the “Support” tab in the top right corner.
3. Click on “Contact Us” and select the appropriate option based on your issue.
4. Follow the instructions provided to contact ADP support.

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Make sure that you provide as much information as possible when contacting ADP support. This will help them diagnose and resolve the issue more quickly.


ADP Error Code 100 can be frustrating, but it can be resolved by following the steps outlined in this article. By checking your login credentials, network connection, clearing your browser cache and cookies, and contacting ADP support, you can resolve ADP Error Code 100 and get back to using ADP without any issues.

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