Signs Your PC Has Malware

Before you start removing malware, you need to confirm you actually have it. Common signs include:

• Pop-up ads appearing on your desktop or in your browser (even when you’re not on a website)
• Browser redirects — you search for something and get sent to a different site
• New toolbars or extensions you didn’t install
• Computer running slow for no obvious reason
• Programs opening or closing by themselves
• Fake antivirus warnings telling you to call a phone number
• Ransom messages saying your files are encrypted

If you’re experiencing any of these, your computer is likely infected. Here’s how to clean it.

Step 1: Disconnect from the Internet

First, disconnect your computer from WiFi or unplug the ethernet cable. This prevents the malware from:

• Sending your personal data to attackers
• Downloading additional malware
• Spreading to other devices on your network

Don’t skip this step, especially if you see ransomware warnings.

Step 2: Boot into Safe Mode

Safe Mode starts Windows with only essential drivers and services, which prevents most malware from running.

How to enter Safe Mode on Windows 10/11:

1. Hold Shift and click Restart
2. Choose Troubleshoot → Advanced Options → Startup Settings → Restart
3. Press 4 or F4 for Safe Mode (or 5/F5 for Safe Mode with Networking if you need to download tools)

Step 3: Run Malwarebytes (Free)

Malwarebytes is the most effective free malware removal tool available. It catches threats that Windows Defender and most antivirus programs miss.

1. Download Malwarebytes from malwarebytes.com (if you disconnected from internet, download on another device and transfer via USB)
2. Install and run a Full Scan (not Quick Scan)
3. Let it quarantine everything it finds
4. Restart your computer

This alone fixes about 70% of malware infections.

Step 4: Run a Second Opinion Scanner

No single tool catches everything. After Malwarebytes, run one of these:

• HitmanPro — excellent at finding rootkits and zero-day threats
• ESET Online Scanner — thorough cloud-based scanner
• Kaspersky Virus Removal Tool — strong against banking trojans

Run whichever you choose, quarantine any additional findings, and restart again.

Step 5: Clean Up Your Browser

Malware often installs browser extensions, changes your homepage, and modifies your search engine. After removing the malware itself:

1. Open your browser Settings → Extensions → remove anything you don’t recognize
2. Reset your homepage and search engine to Google
3. Clear all browsing data (cookies, cache, history)
4. Consider resetting your browser entirely: Settings → Reset and clean up → Restore settings to their original defaults

Step 6: Change Your Passwords

If malware was on your system, assume your passwords are compromised. Change passwords for:

• Email accounts (most important — email is the master key to all other accounts)
• Banking and financial sites
• Amazon, social media, and any site with stored payment info

Do this from a clean device or after you’re confident the malware is gone. Use a password manager going forward.

Related Guides

• How to Completely Remove a Computer Virus
• How to Remove Malware in Windows 11
• How to Remove a Browser Hijacker

When to Call a Professional

Call a professional if:

• The malware comes back after removal
• You see ransomware (encrypted files with ransom demands)
• Your computer won’t boot or is stuck in a loop
• You’re not comfortable doing the steps above
• You suspect someone has been accessing your accounts

At Techrepair DFW, we remove malware on-site across Dallas-Fort Worth. Our technicians use enterprise-grade tools that go beyond what free scanners can do, and we harden your system to prevent reinfection. Same-day service, $64.99 diagnostic.

Get Professional Help in Dallas-Fort Worth

If you need hands-on help, Techrepair DFW provides same-day on-site service across the entire Dallas-Fort Worth metroplex. Our certified technicians come to your home or office with the tools and parts needed to resolve your issue — usually in one visit.

Call 469-293-2893 or book online for same-day service.