Do the following:

1. Open the Registry Editor (regedit.exe).
    

   Always back up the whole registry before making any modifications. Incorrect changes to the registry can cause serious system problems.

    
2. Go to KEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\TmXPFlt\Parameters.
3. Change the value of the "DebugLogFlags" key to "3EFF" if it exists. If it does not, create the REG_DWORD named “DebugLogFlags” with the value “3EFF”.
    

   Registry Information:
   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\TmXPFlt\Parameters]
   "DebugLogFlags"=dword:00003eff

    
4. Replicate the procedure that caused the scan engine issue you encountered.
5. Find the TmFilter.log file in the %SystemRoot% folder and send it to Trend Micro Technical Support.
6. Disable debug logging by changing the value of the "DebugLogFlags" key to "0".