Detected Severe threat TroganHTLM/Phish.JS7 Quarentine failed

Follow these steps to remove the trojan and stabilize the PC.

1. Run Microsoft Safety Scanner
2. Go to the Microsoft Safety Scanner download page: https://learn.microsoft.com/defender-endpoint/safety-scanner-download (or the URL given in the documentation).
3. Download the tool and save it to the desktop (file name is typically msert.exe).
4. Restart the PC and boot into Safe Mode:
   • While the PC is starting, repeatedly press F8 (on Windows 7/8-style boot) or use the Windows 11 advanced startup menu if available.
   • Choose Safe Mode.
5. In Safe Mode, double‑click the Microsoft Safety Scanner icon.
6. Accept the license agreement and select Quick scan (or Full scan if time allows), then Next.
7. Let the scan finish and follow the prompts to remove any detected malware.
8. If the threat is only partially removed If security software reports the threat as partially removed, additional cleanup is required:
9. Run the Malicious Software Removal Tool:
   • Press Windows key + R to open Run.
   • Type: %windir%\system32\mrt.exe and select OK.
   • If prompted, select Yes to allow changes.
   • Choose a Full scan and let it complete, then follow the prompts to clean the PC.
10. Restart the PC.
11. Manually install the latest Windows Updates using the standard Windows Update process.
12. If the malware keeps coming back If the same or similar threat is detected again after restart, use Microsoft Defender Offline:
13. Save any open work.
14. Go to Start > Settings > Update & Security > Windows Security > Virus & threat protection.
15. Under Current threats, select Scan options.
16. Choose Windows Defender Offline scan and select Scan now.
17. The PC will restart and run an offline scan to detect and remove hidden or persistent malware.
18. General protection against trojans and phishing
19. Keep Microsoft Defender Antivirus turned on and updated.
20. Avoid downloading software or opening attachments from unknown or untrusted sources.
21. Use a modern browser (such as Microsoft Edge) with Microsoft Defender SmartScreen enabled to block malicious or phishing sites.

If, after these steps, the PC is still unstable or threats continue to reappear, back up important files and consider a repair install or reset of Windows.

References:

• How to remove the PC Repair virus
• Trojans
• Antivirus and antimalware software: FAQ
• Troubleshoot problems with detecting and removing malware
• Endpoint Protection client frequently asked questions