Trojan Detected

If the same trojans are detected again after each restart, the most likely issue is recurring malware or a hidden component reinstalling it.

Recommended steps:

1. In Windows Security, review the detection and choose Clean computer if prompted.
   • Show details lets the available actions be selected:
     • Remove: permanently deletes the file
     • Quarantine: moves it to a safe location so it cannot run
     • Allow: lets it run and stops future alerts; use this only if the software and publisher are trusted
2. Make sure Microsoft Defender Antivirus is fully updated before scanning:
   • Go to Start > Settings > Update & Security > Windows Security > Virus & threat protection
   • Under Virus & threat protection updates, select Check for updates
   • Under Threat definitions, select Check for updates
3. Turn on these protection features if they were disabled:
   • Cloud-delivered protection
   • Automatic sample submission
   • Path: Start > Settings > Update & Security > Windows Security > Virus & threat protection > Manage settings
4. Run a Microsoft Defender Offline scan. This is the key step when malware keeps coming back after reboot.
   • Warning: the PC will restart before the scan starts, so save all work first.
   • Go to Start > Settings > Update & Security > Windows Security > Virus & threat protection
   • Under Current threats, select Scan options
   • Select Windows Defender Offline scan
   • Select Scan now
5. Avoid reopening the source of the infection after cleanup, such as suspicious downloads, websites, or email attachments, because the malware can be reintroduced.
6. If suspicious files still are not detected or the detections appear incorrect, submit the file to Microsoft for analysis: Submit a file for malware analysis.

If scans also fail or produce errors, run Windows Update and then try the scan again.

References:

• Troubleshoot problems with detecting and removing malware
• Antivirus and antimalware software: FAQ
• Endpoint Protection client frequently asked questions