A scheduled on-demand scan that is configured locally or through ePolicy Orchestrator (ePO) and uses Windows user credentials, fails randomly when scanning a local drive.
When the scan failure occurs, the following happens:
- The following error is written to the OnDemandScanLog.txt:
Scan Terminated <computer_name>\SYSTEM Authentication Failed
- The status of Last Result under Full Scan in the VirusScan console shows Authentication Failed.
- The following event might also be written to the Windows Application Event log:
Source: McLogEvent
Event ID: 257
Level: Information
Event Data Task fail to start
