In this article:  

• Issue description

• Possible causes

• Prerequisites

• Resolution

• Related topics and articles

• When and how to reach support

Issue description  

During the installation of ADAudit Plus, administrators may encounter the error message:

"Fatal Error (0x643)"
This issue occurs specifically during the installation process and can affect all versions of ADAudit Plus. It primarily impacts administrators attempting to deploy the software.

Prerequisites  

Before troubleshooting, ensure:

• .NET Framework 4.5 or above is installed on the system.

• The installation directory has full permissions for the SYSTEM account.

• ADAudit Plus is not already installed on the system.

Possible causes  

• Missing System Requirements

• The required .NET Framework (4.5 or above) may not be installed.

• ADAudit Plus may already be present as an installed application, causing conflicts.

• Insufficient Access to Admin Share

• The service account configured for ADAudit Plus may not have access to the admin share (C$\Windows) on the target machine.

• The configured credentials may lack file-writing privileges, preventing installation.

• Service Log On Permission Issues

• The ManageEngine ADAudit Plus service may not have the correct logon permissions, restricting its ability to execute installation processes.

• Corrupt or Unregistered Windows Installer Components

• Windows Installer components may be corrupt or unregistered, leading to installation failures.

• A system restart or manual re-registration of Windows Installer may be required.

Resolution 

Step 1: Check system requirements  

1. Open Control Panel > Programs and Features.

2. Verify that .NET Framework 4.5 or above is installed.

3. Ensure that ADAudit Plus is not listed as an installed application.

Step 2: Verify access to the admin share  

1. Open Run (Windows + R), type:

2. \\<TargetComputer>\C$

3. Press Enter.

4. Use the service account configured for ADAudit Plus to access C:\Windows on the target computer.

5. If access is denied, modify domain settings:

• Log in to ADAudit Plus.

• Navigate to Domain Settings > Modify Credentials.

• Enter the credentials of an account with file-writing privileges for C:\Windows.

Step 3: Configure ADAudit Plus service log on permissions  

1. Open Run (Windows + R), type services.msc, and press Enter.

2. Locate ManageEngine ADAudit Plus, right-click, and select Properties.

3. Go to the Log On tab and select This account.

4. Enter administrator credentials and apply changes.

Step 4: Restart and re-register windows installer  

1. Open Run (Windows + R), type:

2. msiexec /unregister

3. Press Enter.

4. Again, open Run and type:

5. msiexec /register

6. Press Enter.

7. Restart the system and attempt the installation again.

Related topics and articles  

• Troubleshooting Windows Installer Errors

• System Requirements for ADAudit Plus

• General Installation Guide

When and how to reach support