A Trojan horse is a deceptive type of malware that disguises itself as legitimate software to gain unauthorized access to your system. Unlike viruses, Trojans do not self-replicate, but they can open "backdoors" for hackers to steal your data, record your keystrokes, or install additional ransomware. If your computer is experiencing unexplained slowdowns, frequent crashes, or unauthorized file changes, you may be infected.

Step 1: Disconnect from the Internet

The first and most critical step in stopping a Trojan is to sever its connection to the attacker. By turning off your Wi-Fi or unplugging your Ethernet cable, you prevent the malware from transmitting your sensitive data (like passwords or banking info) to a remote server or receiving new malicious instructions.

Step 2: Enter Safe Mode with Networking

Trojans often integrate themselves into your system's startup processes to remain active. Booting into Safe Mode ensures that only the minimum required drivers are loaded, often preventing the Trojan from running.

• Click Start > Settings > System > Recovery.
• Under Advanced startup, click Restart now.
• Once the PC restarts, go to Troubleshoot > Advanced options > Startup Settings > Restart.
• Press 5 or F5 to select Safe Mode with Networking.

Step 3: Delete Temporary Files

Many Trojans hide their primary payload or installers in temporary folders. Deleting these files can speed up your virus scan and potentially remove the malware's source. Search for Disk Cleanup in your Start menu, select your primary drive, and ensure Temporary files is checked before clicking OK.

Step 4: Check for Suspicious Processes

Open the Task Manager (Ctrl + Shift + Esc) and click on the Details tab. Look for processes with unusual names (random strings of characters) or those consuming high CPU/Disk resources without a clear reason. If you find a suspicious file, right-click it and select Open file location to see where it is hidden, then click End Task.

Step 5: Run a Microsoft Defender Offline Scan

Some sophisticated Trojans can hide from scanners while the operating system is running. Use the Microsoft Defender Offline tool to scan your system before Windows fully loads. Go to Windows Security > Virus & threat protection > Scan options. Select Microsoft Defender Antivirus (offline scan) and click Scan now. Your PC will restart and perform a deep scan.

Step 6: Use a Specialized Malware Scanner

Since Trojans are designed to be stealthy, it is best to use a reputable second-opinion scanner like Malwarebytes. Download and run a Full Threat Scan. If the software identifies any "Trojans," "Backdoors," or "PUPs," click Quarantine and then permanently delete them from the quarantine zone.

Step 7: Reset Browser Settings and Extensions

Trojans often bundle malicious browser extensions to track your online activity. Open your browser settings and navigate to the Extensions or Add-ons menu. Remove any entries that you do not recognize. Additionally, use the Reset settings option in your browser to clear any malicious redirects or homepage changes.

Step 8: Change Your Credentials and Enable 2FA

Once the infection is cleared, you must assume that your passwords were compromised. Change the passwords for your primary email, bank accounts, and social media. Most importantly, enable Two-Factor Authentication (2FA) on all sensitive accounts to ensure that even if a hacker has your password, they cannot gain access.

💡 Pro Tip: Keep your software updated to avoid these issues in the future.