Free Antivirus Check for Windows

Use Loaris as a second-opinion antivirus scan when your current protection says everything is fine but the PC still shows pop-ups, redirects, slowdowns, or other suspicious behavior.

Start a free antivirus check without replacing the protection you already use:

Start Free Antivirus Check How to Run the Scan

When a Second-Opinion Antivirus Scan Makes Sense

Use this page when you already have antivirus protection but still want another look at suspicious symptoms on Windows.
Compatibility

Works With Any Antivirus

Install alongside Microsoft Defender, Avast, Kaspersky, Bitdefender, Malwarebytes, Norton, or any other security solution.

No Conflicts

Zero System Conflicts

Unlike real-time antivirus tools, Loaris runs on-demand scans only, so there's no interference with your existing protection.

Detection

Catches What Others Miss

Different scanners use different detection methods. Loaris specializes in Trojans, rootkits, and stealthy malware that traditional AV often overlooks.

Lightweight

No Background Processes

Loaris doesn't run constantly in the background. Scan when you want, close when you're done. Zero impact on system performance.

Free

Completely Free to Scan

Download and scan your entire system for free. No credit card required. See exactly what threats are hiding on your PC.

Trust

Trusted Since 2006

Over 18 years of protecting users worldwide. Join millions who trust Loaris as their second line of defense.

Free Antivirus Scanner
Second Opinion Use a free antivirus check without removing your current protection

Run a free antivirus scan on Windows when “clean” does not feel right

Use Loaris when you want a free antivirus check for Windows that works alongside Defender or another antivirus and helps confirm whether hidden malware, browser abuse, or junk software are still active.

Download Free Antivirus

How to use Loaris as a second-opinion antivirus scan

This page is for users who want an extra antivirus check on Windows without replacing Defender or any other suite they already trust.

1. Keep your current antivirus installed

You do not need to remove Defender, Avast, Kaspersky, Bitdefender, or another suite. Loaris is meant to be used as an on-demand second-opinion scan.

2. Run the antivirus check when symptoms remain

Start the scan if pop-ups, redirects, fake alerts, suspicious installers, or slowdowns continue even after your main antivirus reports the system as clean.

3. Review the findings and decide the next step

Use the results to confirm whether the issue still looks like malware, browser abuse, or bundled junk software before you change system settings or replace your current protection.

How to use Loaris as a second-opinion antivirus scan

Choose the right Windows scan path

Use the Free Antivirus check when you want a second opinion without replacing Defender or another suite. Use Trojan Scanner for suspicious installers and backdoors, or Free Virus Scan when you want a broad malware check first.

Trojan Scanner for Windows

Open Trojan Scanner for Windows when the problem looks specifically like a trojan, downloader, or fake installer incident.

Free Virus Scan for Windows

Open Free Virus Scan for Windows when you want a broader malware scan before narrowing the issue down to one threat family.

Don't take our word for it

"I run Loaris alongside Windows Defender. It catches things Defender misses every time."
- Michael T., Seattle, WA
"I was skeptical about running two security tools, but Loaris never conflicts with my Kaspersky."
- Sarah K., Denver, CO
"Best second opinion scanner I've used. Found a rootkit that Bitdefender completely missed."

Free Antivirus FAQ

What is a second-opinion antivirus scan?
A second-opinion antivirus scan is an extra malware check you run when Defender or another antivirus reports the PC as clean but suspicious symptoms remain. On this page, “Free Antivirus” means that kind of free on-demand antivirus check for Windows.
Will Loaris conflict with my existing antivirus?
No. Loaris Trojan Remover works as an on-demand scanner, so it can be used alongside Microsoft Defender and other major antivirus products without replacing your current setup.
Can I use Loaris with Microsoft Defender or another antivirus?
Yes. That is one of the main use cases for this page. Loaris is meant to give you a second opinion when you want another malware check without uninstalling Defender or another antivirus you already trust.
Is Free Antivirus a different product from Loaris Trojan Remover?
No. Loaris Trojan Remover is the product you download. This page uses “Free Antivirus” because many users search for a free antivirus check or second-opinion scan first. The same Loaris app helps you scan the PC, review suspicious findings, and remove threats.

Need help? If the issue looks like a fake installer or backdoor, open Trojan Scanner for Windows. If you want a broader malware check first, open Free Virus Scan for Windows. You can also review the Virus Scan Guide or visit the FAQ.