I get the above error occasionally (not always) when shutting down Windows XP. Details: The instruction "Ox774e2Obb" reference memory at Ox13cb26b1. The memory could not be written. Click OK to terminate program Click Cancel to debug Refering to Error Log the following is recerded. The OMSCAN service failed due to: The system cannot find the file specified. Any ideas on what file is missing? My Windows XP is fully up to date. williamj.