What to Do When You Suspect a Virus or Malware Infection

If your computer’s acting strange—slow performance, pop-ups, or programs crashing—you might be dealing with a virus or malware infection. We get calls like this all the time: “Is my computer infected?” In this article, we’ll walk you through the most common signs of infection, how to stay calm, and the safest steps to detect, remove, and protect your system from future threats.

We get this call all the time: “My computer is acting weird—do I have a virus?”

If your system is slow, programs are crashing, or strange pop-ups keep showing up, you might be dealing with a virus or malware infection . The good news is: there are steps you can take right now to stay safe and protect your data.

Here’s how to recognize the signs—and what to do next.

Common Signs of a Virus or Malware Infection:

• Sudden slowdown in performance
• Annoying pop-ups or fake system alerts
• Your homepage or search engine keeps changing
• Files missing or moved
• Antivirus or system settings are disabled without your permission
• Unexpected charges on online accounts

What NOT to Do:

Let’s be clear: don’t panic, but also don’t trust everything you see.

1. Never call fake Microsoft or antivirus phone numbers that appear in pop-ups. Those are scams. Microsoft and other legit tech companies will never display warning messages telling you to call them.
2. Don’t click suspicious email links, attachments, or text messages. If it seems strange, it probably is. When in doubt—delete it.
3. Don’t install “free cleanup tools” from pop-ups. These often contain more malware or steal your personal information.

What You SHOULD Do:

• Disconnect from the internet if the system is acting erratically.
• Run a full system scan using Windows Defender or a trusted tool like Malwarebytes.
• Back up your important files , just in case.
• Call a professional if the problem doesn’t go away.

Prevention Tips:

• Keep your antivirus software updated
• Use strong, unique passwords
• Avoid downloading unknown apps or files
• Update your operating system and drivers regularly
• Be cautious with USB drives or shared devices

Need Help? We’ve Got Your Back when a virus and malware infection happens.

If you suspect a virus or malware infection, don’t wait for things to get worse. At Houston Tech Guys , we specialize in safe virus removal, malware cleanup, and securing your system from future threats—whether at home or for your business.

Call us today or schedule a remote or in-person cleanup. We'll make sure your system is clean, fast, and protected.