What to do if You Get a Trojan Virus on Your PC?

Updated on October 21, 2022, by Xcitium

What Should You Do If You Get a Trojan Virus?

If you get a Trojan virus, disconnect the infected device from the internet, run a full malware and antivirus scan, remove suspicious files or applications, reset compromised passwords, and monitor for unusual activity. Businesses should also investigate whether attackers installed backdoors or stole sensitive data.

Just like any usual day, you’re on your computer downloading some programs. All you want is a program that can help you with the small tasks you have, but then the program you ran on your computer is a Trojan horse virus. It started to change your settings and affect your computer system.

What to do if You Get a Trojan Virus: What can a Trojan Virus Do to You?

The Trojan horse virus can resemble any file or program that many users, like you, want or needs it on their computer’s hard drive or folders. It can be as cheesy as a heartbreak song or an all-time favorite gaming software. So the best way to determine a Trojan horse virus on a computer is to look for the signs. The following are the dangerous abilities of a Trojan horse virus on an infected computer:

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# 1: Spying

Trojans can work as a Spyware. It’ll wait until you use your online accounts or enter your credit card details. Then, it’ll send your passwords and other information back to the cybercriminal.

# 2: Creating backdoors

Trojans also can change your codes or your security system. With that, even more malware can get through your security tools without getting noticed.

# 3: Turns your endpoint into a zombie!

Cybercriminals don’t just steal accounts or information, they also pester other people using DDoS attacks. To do that, they’ll implant Trojans into an endpoint and use it for their interest. That will put you in great trouble as cyber crimes are detected through IP addresses of the endpoint.

# 4: Language Settings Changed

Your computer language suddenly changed without you changing it. It’s a one of the symptoms of a Trojan. Your screen can also show back-to-front and other strange activities can tell you that you have an infected computer system.

# 5: Send expensive SMS messages

Computers aren’t the only targets of Trojan horse viruses. It can also exploit smartphones to send expensive SMS messages to premium numbers. A cyber criminal can make money through this modus operandi.

# 6: Extremely Slow Computer

If you think that having too many files and running multiple applications all the same time can slow down the computer, it’s not the only cause. A computer Trojan can also decrease the speed of your computer because it must be using many resources.

Signs Your Device Has a Trojan Virus

Common Trojan infection signs include:

slow system performance
unusual pop-ups
browser redirects
disabled antivirus software
suspicious background processes
unauthorized account access
unexpected crashes
high CPU or network usage

Advanced Trojans may remain hidden while stealing sensitive data or downloading additional malware.

Step-by-Step Guide to Remove a Trojan Virus

1. Disconnect the Device From the Internet

Immediately disconnect infected systems from:

Wi-Fi networks
Ethernet connections
shared drives
cloud storage

This helps stop data theft and malware communication.

2. Run a Full Antivirus and Malware Scan

Use trusted:

antivirus software
anti-malware tools
endpoint detection and response (EDR) solutions

to identify and remove malicious files and processes.

3. Remove Suspicious Programs and Files

Delete:

unknown applications
fake software installers
malicious browser extensions
suspicious startup entries

Many Trojans disguise themselves as legitimate software.

4. Check for Persistence Mechanisms

Inspect:

startup folders
scheduled tasks
registry entries
administrator accounts

Some Trojans create hidden persistence methods to survive reboots.

5. Reset Passwords Immediately

Change:

email passwords
banking credentials
cloud accounts
VPN access
administrator passwords

Many Trojans steal credentials using keylogging or spyware functions.

6. Update Operating Systems and Software

Patch:

operating systems
browsers
applications
plugins

Unpatched vulnerabilities often help malware spread.

7. Monitor for Suspicious Activity

Continue monitoring systems using:

endpoint security tools
network monitoring
behavioral analytics
SIEM platforms

to detect reinfection attempts or hidden backdoors.

Trojan Virus vs Virus vs Worm

Feature	Trojan	Virus	Worm
Disguised as Legitimate Software	Yes	No	No
Self-Replicates	No	Yes	Yes
Requires User Interaction	Usually	Sometimes	No
Main Purpose	Stealth access and theft	File infection	Rapid spread
Common Delivery Method	Social engineering	File infection	Network exploits

Trojans rely heavily on deception and social engineering to infect systems.

How Trojan Viruses Spread

Trojans commonly spread through:

phishing emails
malicious attachments
fake software updates
pirated software
infected downloads
malicious ads
compromised websites

Cybercriminals often disguise Trojans as trusted applications or files.

Why Trojan Viruses Are Dangerous for Businesses

Trojan malware is especially dangerous for organizations because it can:

compromise employee credentials
steal customer data
create persistent backdoors
deploy ransomware
bypass traditional security tools

Modern enterprises should combine:

endpoint detection and response (EDR)
behavioral analytics
zero trust security
cloud threat intelligence
continuous monitoring

to reduce Trojan malware risks.

What to do if You Get a Trojan Virus Tips

So now you’re asking yourself, “What to do if you get a Trojan virus?” Is it possible? Can you do it by yourself? Of course, there are two ways to do it. First, you can try to do it using manual methods. Secondly, you can try using a software to do the job for you.

Even if the Trojan can be hard to remove because they turn into hidden files on your computer, the following manual steps can help you manually remove the Trojan from your computer:

Step 1: Identify the Trojan

After recognizing a file infected with Trojan horse, it becomes easy to remove. Most of the time, your system will give you a DLL error, which is associated with the Trojan attack. You can copy the error and find out about the affected exe file online.

Step 2: Disable the function of System Restore

If you forget this step, then it will restore the files you delete.

Step 3: Restart the Computer

When you restart, press F8 and then select safe mode to start your computer.

Step 4: Go to Add or Remove Programs

You will find this in the control panel. Then, you can remove the programs affected by Trojan Horse.

Step 5: Remove extensions

To delete all files of a program, you should remove them from the Windows System folder.

When you have successfully done the provided procedures, you should restart your system in normal mode already. You can now use a Trojan virus-free computer and just be extra careful next time not to be infected again.

What to do if You Get a Trojan: Other ways of removing the Trojan

You need to display the hidden folders from the folder options.
- Then, you have to restart the system in safe mode.
- After that, you need to disable the processes that are associated with the Trojan virus.

However, to complete these steps, you will have to edit your system’s registry.

Modern Trojan Malware Trends

Modern Trojan attacks increasingly use:

phishing campaigns
AI-generated social engineering
malicious browser extensions
fake software updates
fileless malware techniques

Attackers often combine Trojans with spyware and ransomware to maximize damage.

What to do if You Get a Trojan Virus: Can’t stand doing manual Trojan removal?

Even if manual removal can help you save your computer, technical computer settings might not be your best skill. So now, what can help you is the specific Trojan horse virus protection that can eradicate such pesky Trojan horse virus in the computer.

All you need is to use the Advanced Endpoint Protection to fight the Trojan horse virus symptoms. It is the next-generation cyber security solution that blocks bad files and automatically contains unknown files in a virtual container using Default Deny Platform™ and containerization technology. The unknown “contained” file is analyzed and an accelerated verdict is obtained through the Valkyrie cloud-based advanced malware analysis platform. It gives you the Trojan horse virus protection.

What to do if You Get a Trojan Virus Conclusion

Xcitium Advanced Endpoint Protection provides a lightweight, scalable Default Deny Platform with a unique endpoint security approach. This results in complete protection and enterprise visibility. The app-based platform removes the difficulty in using and solving the issues. Provisioned in minutes, Xcitium Advanced Endpoint Protection also contains a unified IT and security management console, that through an app-enabled platform reduces the effort of managing your Android, iOS, OSX, Linux, and Windows devices, on every segment of your physical and virtual networks.

Frequently Asked Questions

What should I do if I get a Trojan virus?

Disconnect the infected device from the internet, run antivirus and malware scans, remove suspicious files, and reset compromised passwords.

Can antivirus software remove Trojans?

Yes. Most modern antivirus and endpoint security tools can detect and remove many Trojan infections.

Can a Trojan steal passwords?

Yes. Many Trojans use spyware and keylogging capabilities to steal credentials and sensitive information.

How do Trojan viruses spread?

Trojans commonly spread through phishing emails, fake downloads, malicious ads, and infected attachments.

What are signs of a Trojan infection?

Common signs include slow performance, suspicious pop-ups, browser redirects, disabled antivirus software, and unusual network activity.