Fix Symantec AntiVirus Client Install / Uninstall Error 25002

The following error message may be displayed when you are installing or uninstalling Symantec AntiVirus Corporate Edition client on your Windows computer after you select the default directory and then click the Next button:

Error 25002: Failed to load navinsnt.dll.

In the error message box, when you click OK, a message may be displayed informing you that all changes done by the installer will now be reverted and the progress bar will start moving in the opposite direction.

Cause of the Error

Error 25002 in this case occurs when one of the following conditions hold true:

  • You do not have the required rights to uninstall the Symantec AntiVirus Client.
  • Navinsnt.dll or Navins95.dll file is corrupt.
  • An incorrect entry exists in the Windows registry.
  • Installation or the upgrade files on Symantec Antivirus are either damaged or incomplete.

Resolution Method

To resolve the error, perform the steps in the methods listed below. After performing the steps in each method retry to install/uninstall Symantec AntiVirus Client. If you fail, proceed to the next method.

Method 1: Ensure that you are logged on with sufficient rights to the system.

To uninstall Symantec AntiVirus client from a on Windows NT, Windows 2000, Windows XP, or a Windows 2003 computer, you must be logged on to the computer with a user account that has the local administrator rights to the system. This means that the user account you are logged on as should have full rights to edit the Windows registry and system files.

If you aren’t logged on as an administrative user, log out and then log in again with a user account that has the required rights.

Method 2: Repair the corrupt Navinsnt.dll or Navins95.dll files.

If you have a Windows NT, Windows 2000, or Windows XP computer, search for the Navinsnt.dll file. When you find the file, right-click on it and rename it to say Navinsnt.bak. After renaming, start the installation of Symantec AntiVirus again.

If you are on a Windows 98 or Windows ME computer, search for the Navins95.dll file. When you find the file, right-click on it and rename it to say Navins95.bak. After renaming, start the installation of Symantec AntiVirus again.

Method 3: Rectify incorrect registry settings.

Warning: The following steps require you to make direct changes to the Windows registry. Because the registry is an essential component for the functioning of your Windows computer, you must be very careful while working with it. For safety, it is recommended that you backup the registry before making any changes to it. You can easily backup the registry by using the File > Export option in the Registry Editor tool or by using a reliable, third-party registry tool.

  1. Open Start menu, select Run, type regedit, and then click the OK button.
  2. In the Registry Editor window, navigate to the following registry key:
  3. HKEY_LOCAL_MACHINE\System\CurrentControlSet\Contr ol\FileSystem

  4. Double-click NtfsDisable8Dot3NameCreation in the right-pane.
  5. Next, change the data in the Value data field from 1 to 0.
  6. Exit the Registry Editor and then restart your PC.
  7. Install Symantec AntiVirus Corporate Edition client on your computer.
  8. After the installation is complete, change the value of NtfsDisable8Dot3NameCreation back to 1.

Method 4: Resolve issues with damaged or incomplete Symantec AntiVirus installation.

  1. On Windows 2000, Windows XP, and Window 2003, clear the contents of the following folders:
    • C:\Winnt\Temp or C:\Windows\Temp
    • C:\Documents and Settings\<User name>\Local Settings\Temp

    On Windows 98 and Windows ME, clear the contents of the following folders:

    • C:\Windows\Temp

    On Windows NT, clear the contents of the following folders:

    • C:\Temp
    • C:\Winnt\Profiles\<User_name>\Local Settings\Temp
  2. Next, open the Registry Editor and navigate to the following registry key:
  3. HKEY_LOCAL_MACHINE\SOFTWARE\INTEL\DLLUsage

    Here, if the VP6 key is present, delete it.

  4. Next, search for the following values in the registry and if you find any, delete them:
  5. VirusProtect6
    74BE21DBFDBD3D11EBAE000ACC725290
    86C46C6D5F9F3D11EBAE000ACC725290
    9526CFE08DA32DC4CB754D39A75FCCE0
    AC68B2D7D5D2E96429DE5EB626DBD1C3
    497CA84818B8A04418EA464733D75B72

  6. Now, navigate to the following registry key:
  7. HKEY_LOCAL_MACHINE\Software\Symantec key:

    And delete the following entries:

    Repair
    SourceDir
    DestDir
    Remove
    InstallDir

    Note: If you have no other Symantec product installed on your PC, you may even delete the HKEY_LOCAL_MACHINE\Software\Symantec key. Don’t delete this key if you are running any other Symantec software because deleting this key will disable these other Symantec products also.

  8. Restart your computer and run the installation for Symantec AntiVirus Corporate client.
  9. You may also try to use a reliable third-party program uninstaller tool, such as Perfect Uninstaller to forcefully remove all installation data of the program from your computer.