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CA ARCserve backup stops the Real-Time Scan and causes the system to hang

    • Updated:
    • 24 Nov 2016
    • Product/Version:
    • ServerProtect for Microsoft Windows/Novell Netware 5.8
    • Worry-Free Business Security Standard/Advanced 7.0
    • Worry-Free Business Security Standard/Advanced 8.0
    • Worry-Free Business Security Standard/Advanced 9.0
    • Platform:
    • Windows 2003 Enterprise Server
    • Windows 2003 Standard Server Edition
    • Windows 2008 Small Business Server
    • Windows 2008 Standard Server Edition
    • Windows 7 32-bit
    • Windows 7 64-bit
    • Windows Vista 32-bit
    • Windows Vista 64-bit
    • Windows XP Professional

When the Trend Micro Scan Engine (VSAPI) extracts files from an archive to the product temp folder for real-time scanning, the kernel driver of CA ARCserve Backup (ofant.sys) traps the File create operations of the VSAPI scanning threads and causes the system to hang.


There are two ways to resolve this issue. Follow either of the options below:

Option 1 (Recommended)

Use the workaround that CA released.

  • The instructions are in Japanese. For further assistance on the workaround, contact CA support.
  • The Agent for Open Files has been updated to ensure that it runs properly in computers installed with 
    Trend Micro anti-virus products.

Option 2

Add the product temp folder in the scanning exception list to eliminate the interference of the ofant.sys driver.

  1. Log on to the WFBS console.
  2. Click Security Settings.
  3. Click the group or domain that you want to configure.
  4. Click Configure.
  5. Click Antivirus/AntiSpyware.
  6. Under Exclusions section, enter the default Client/Server Security Agent temp folder.
    • For WFBS 8.0/9.0:
      • 32-Bit: C:\Program Files\Trend Micro\Client Server Security Agent\Temp.
      • 64-Bit: C:\Program Files (x86)\Trend Micro\Client Server Security Agent\Temp.
    • For WFBS 7.0: C:\Program Files\Trend Micro\AMSP\Temp.
  7. Click Add.
  8. Click Save.
  9. Open the Registry Editor (regedit.exe) to verify that the setting has been deployed to the client side. The "ExcludedFolder" registry hive should contain the folder you added.
  10. Configure Manual Scan or Scheduled Scan.
    1. Click Scan > Manual Scan or Scheduled Scan.
    2. Click the group or domain you want to configure.
    3. Repeat Steps 6-8.

For more related information, refer to the following CA links:

Solution Id:
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