How to Repair Cntaosmgr.exe Related Error Message

CNTAoSMgr.exe is Trend Micro’s Plug-in Manager. This executable is installed automatically when you install or upgrade Trend Micro’s OfficeScan client. The purpose of the plug-in manager is to make all OfficeScan programs developed outside of a product release immediately available to users. So, whenever a new plug-in is available, OfficeScan server downloads it from the Trend Micro website and then the Plug-in manager deploys it to all the clients. The link to the client plug-in program is added to the OfficeScan console screen. To access this plug-in, you may do one of the following:

  • Right-click OfficeScan system tray icon and then select Plug-in Manager.
  • In the OfficeScan console screen, click Plug-in Manager located in the upper-right section.

File Information

By default, CNTAoSMgr.exe is added to a subfolder within the C:\Program Files folder. The most common size on Windows XP is 415,352 bytes. You may also find it in 427,384 bytes and 435,576 bytes.

CNTAoSMgr.exe Problems

While working on Windows Vista, Windows XP Professional Edition Version – SP1, or Windows 2000 Server – SP4 computers, you may receive the following error message when your PC boots up:

Error message: "CNTAoSMgr.exe - Application Error ------ The instruction at "0x0041B942" Referenced memory at "0x00181000". The memory could not be "read""

The issue may recur even after you uninstall and then reinstall the OfficeScan client.

Cause of the Error

The issue occurs when installing an application can corrupt its performance counter strings and stop them from working.

Resolution Method

When an application with Performance Monitor (PM) counters is installed, Windows backs up your registry entries related to the Performance Monitor (PM) in the PerfStringBackup.ini file. Should the new application set up prove to be a failure, Windows still has the previous registry entries to revert back to. You can revert to this backup file, by performing the following steps:

  1. Look for the latest PerfStringBackup.ini that you have.
  2. Restore the file from the backup made before you installed the new application.
  3. Run the following command to restore the registry settings stored in this file:
    Lodctr /r:PerfStringBackup.ini
  4. Restart your PC after the process is complete.

Regular registry cleaning using a quality registry scanner can not only identify problems, but can also fix them before they become a troublesome issue. Regular registry cleaning can help you avoid registry-related errors. We recommend RegServe to help you identify and remove existing registry related errors and to eliminate the occurrence or re-occurrence of registry related errors.

In addition to using RegServe, you should also use an antivirus program like STOPzilla Antivirus to catch any intrusion or current infection on your PC. We also recommend that you install Spyware Cease’s anti-spyware program to remove any existing spyware and to prevent spyware from infiltrating your system.

Regular scanning with a registry cleaner, antivirus and antispyware programs can help maintain optimal PC health and performance.