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How to manually roll back the Anti-Malware Scan Engine 6.x.xx in VirusScan Enterprise
Technical Articles ID:   KB58626
Last Modified:  4/18/2019
Rated:


Environment

McAfee VirusScan Enterprise (VSE) 8.x
McAfee Anti-Malware Scan Engine 6.x.xx

Summary

This article describes how to roll back to a previous supported version of the Scan Engine with VSE. This procedure helps you overcome the following situations where you might have to roll back:
  • Scan Engine update has failed
  • Scan Engine fails to load
  • Failed Scan Engine update causes viruses not to be detected

Solution

x86 or 32-bit Instructions
Manually copy the local backup of the previous Scan Engine to the current Scan Engine folder:
  1. Disable the VSE Access Protection option:
    1. Click Start, Programs, McAfee, VirusScan Console.
    2. Right-click Access Protection and select Properties.
    3. Click the Access Protection tab.
    4. In the lower-left corner, deselect Prevent McAfee services from being stopped.
    5. Click Apply, and then click OK.
       
  2. Stop the McShield service:
    1. Press Windows+R, type services.msc, and click OK.
    2. Right-click McAfee McShield and select Stop.
    3. Close the Services window.
       
  3. Copy the previous version of the Scan Engine:
    1. Rename or delete the existing McScan32.DLL in the Engine folder \\Program Files\Common Files\McAfee\Engine\
    2. Copy McScan32.DLL and Config.DAT from the backup engine folder \\Program Files\Common Files\McAfee\Engine\OldEngine to \\Program Files\Common Files\McAfee\Engine\
    3. Close Windows Explorer.
       
  4. Restart the McShield service:
    1. Press Windows+R, type services.msc, and click OK.
    2. Right-click McAfee McShield and click Start.
    3. Close the Services window.
    4. To verify that the previous Scan Engine version is now installed, right-click the VirusScan icon in the system tray and select About VirusScan Enterprise.
       
  5. Enable the VSE Access Protection option:
    1. Click Start, Programs, McAfee, VirusScan Console.
    2. Right-click Access Protection and select Properties.
    3. Click the Access Protection tab.
    4. In the lower-left corner, select Prevent McAfee services from being stopped.
    5. Click Apply, and then click OK.

Solution

x64 or 64-bit Instructions
Manually copy the local backup of the previous Scan Engine to the current Scan Engine folder:
  1. Disable the VSE Access Protection option:
    1. Click Start, Programs, McAfee, VirusScan Console.
    2. Right-click Access Protection and select Properties.
    3. Click the Access Protection tab.
    4. In the lower-left corner, deselect Prevent McAfee services from being stopped.
    5. Click Apply, and then click OK.
       
  2. Stop the McShield service:
    1. Press Windows+R, type services.msc, and click OK.
    2. Right-click McAfee McShield and select Stop.
    3. Close the Services window. 
       
  3. Copy the previous version of the Scan Engine:
    1. Rename or delete the existing McScan32.DLL in the Engine folder \\Program Files\Common Files\McAfee\Engine\
    2. Copy McScan32.DLL and Config.DAT from the backup engine folder \\Program Files\Common Files\McAfee\Engine\OldEngine to \\Program Files\Common Files\McAfee\Engine\
    3. Rename or delete the existing MScan64a.DLL in the Engine folder \\Program Files (x86)\Common Files\McAfee\Engine\x64\
    4. Copy MScan64a.DLL and Config.DAT from the backup engine folder \\Program Files (x86)\Common Files\McAfee\Engine\OldEngine\x64 to \\Program Files (x86)\Common Files\McAfee\Engine\x64\
    5. Close Windows Explorer.
  1. Restart the McShield service:
    1. Press Windows+R, type services.msc, and click OK.
    2. Right-click McAfee McShield and click Start.
    3. Close the Services window.
    4. To verify that the previous Scan Engine version is now installed, right-click the VirusScan icon in the system tray and select About VirusScan Enterprise.
       
  2. Enable the VSE Access Protection option:
    1. Click Start, Programs, McAfee, VirusScan Console.
    2. Right-click Access Protection and select Properties.
    3. Click the Access Protection tab.
    4. In the lower-left corner, select Prevent McAfee services from being stopped.
    5. Click Apply, and then click OK.

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