Download and Use: Trusted W32/CleanInjector Trojan Removal Tool Guide

How to Remove W32/CleanInjector Trojan: Best Free Removal Tools (2026)

W32/CleanInjector (also reported under names like Injector/Trojan variants) is a Windows Trojan that injects malicious code into processes, disables security tools, and can download additional malware. The steps below give a clear, safe, actionable process to detect and remove it using free tools and built‑in Windows utilities.

Important preparatory steps

• Disconnect the infected PC from the network (unplug Ethernet / disable Wi‑Fi) to stop further payload downloads or data exfiltration.
• Work from an administrator account. If the account is compromised, use another clean admin account or boot from rescue media (steps below).
• Back up important personal files (documents, photos) to an external drive before cleaning. Don’t back up executables or system files — only personal data.

1. Reboot into Safe Mode (to limit malware activity)

1. Open Start → Power. Hold Shift and click Restart.
2. Choose Troubleshoot → Advanced options → Startup Settings → Restart.
3. Press 4 (Enable Safe Mode) or 5 (Safe Mode with Networking if you must download tools).
   Rebooting into Safe Mode prevents many trojans from running and makes scans more effective.

2. Scan and remove with recommended free tools (order matters) Run these scanners one at a time, rebooting into Safe Mode between full‑system scans if the tool recommends it.

• Malwarebytes Free (on-demand scanner)
  • Download from malwarebytes.com, install and update signatures, run a Full Scan, quarantine detected items, then reboot.
• Microsoft Defender Offline or Windows Malicious Software Removal Tool (MSRT)
  • For Defender Offline: Settings → Update & Security → Windows Security → Virus & threat protection → Scan options → Microsoft Defender Offline → Scan now (will reboot and scan outside Windows).
  • For MSRT: download/run mrt.exe from Microsoft or let Windows Update deliver it.
• Kaspersky Virus Removal Tool (free on‑demand)
  • Download Kaspersky Virus Removal Tool, update, run a full scan, quarantine/remove detections.
• ESET Online Scanner (free) or Trend Micro HouseCall (optional second opinion)
  • Use these web/offline scanners for another independent pass.
• AdwCleaner (Malwarebytes) and TDSSKiller (for rootkits)
  • Run AdwCleaner to remove adware/PUPs; run TDSSKiller to remove rootkits specifically. Reboot if prompted.

3. Manual checks and removal (targeted cleanup)

• Check running processes: Task Manager → Processes. Look for suspicious names or high CPU/network usage. Do not immediately End Task unless you’re sure — prefer quarantining via AV tool.
• Check startup: Settings → Apps → Startup, and Autoruns (Sysinternals) to review and disable suspicious entries. Download Autoruns from Microsoft Sysinternals, uncheck entries you recognize as malicious, and note file paths.
• Inspect scheduled tasks: Task Scheduler → Task Scheduler Library. Remove unknown tasks that run executables from temp or AppData.
• Examine common persistence locations and delete malicious files only after quarantining: %TEMP%, %APPDATA%, %LOCALAPPDATA%, C:\Windows\System32 (be careful). Use file hashes and AV reports before manual deletion.

4. If the Trojan resists removal — use rescue media

• Create a bootable rescue USB from a clean PC using tool builders (Kaspersky Rescue Disk, Bitdefender Rescue CD, or Microsoft Defender Offline). Boot infected PC from the USB and run a full offline scan to remove deeply embedded malware or rootkits.

5. Post‑clean verification

• Update Windows and all installed software. Run full scans again with Malwarebytes and Microsoft Defender Offline to confirm no remaining infections.
• Check network connections: netstat -ano (in an admin command prompt) to view suspicious external connections. Investigate unfamiliar outbound IPs/domains.
• Review browser extensions and reset browsers if hijacked.

6. Restore, harden, and monitor

• If you backed up personal files, scan them with Malwarebytes or Defender before restoring.
• Change passwords for online accounts (especially financial and email) from a known-clean device. Enable MFA where possible.
• Reinstall or enable a real‑time antivirus/anti‑malware solution (Windows Defender is acceptable and free). Consider Malwarebytes Premium or another paid endpoint product for extra protection.
• Enable Windows Firewall, install updates, and avoid running unknown executables or cracked software.

7. When to consider a full reinstall

• If malware persists after multiple offline scans, rescue‑disk scans, and manual removal, or if system files appear altered, perform a clean Windows reinstall (clean install) and restore data from scanned backups.

Quick checklist (condensed)

1. Disconnect network.
2. Boot Safe Mode.
3. Run Malwarebytes Free → quarantine → reboot.
4. Run Microsoft Defender Offline / MSRT.
5. Run TDSSKiller, AdwCleaner, Kaspersky Virus Removal Tool.
6. Use Autoruns to remove persistence entries.
7. If needed, boot rescue USB and scan.
8. Update OS, change passwords from clean device, enable real‑time protection.

Resources and downloads (official sources)

• Malwarebytes: https://www.malwarebytes.com
• Microsoft Defender Offline / MSRT: through Windows Security or Microsoft Support site (microsoft.com)
• Kaspersky Virus Removal Tool / Rescue Disk: kaspersky.com
• Microsoft Sysinternals Autoruns, TCPView: docs.microsoft.com/sysinternals
• TDSSKiller (Kaspersky): support.kaspersky.com

Final notes

• Be cautious with “one‑click” removal promises from unknown sites; always download tools from vendor sites.
• If the machine holds critical business data or you suspect theft of credentials, contact a professional incident responder.

If you want, I can convert this into a printable step‑by‑step checklist, a shorter quick‑fix guide for novices, or provide exact command examples for Autoruns, netstat, and scheduled tasks.