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Free Rootkit Scanner and Removal Tool

Your perfect anti-rootkit. Avast Free Antivirus scans and cleans rootkits currently on your device, and stops future rootkits and other types of threats before they can do any damage. 100% free and easy to use.

People love Avast Free Antivirus

6207 people rated us 4.7/5

Our best free rootkit scanner and rootkit cleaner

Avast has over 30 years of experience hunting down malware like rootkits – no matter how well hidden.

Avast Free Antivirus is your secret weapon against rootkits and other kinds of malware:

We’ve packed the world’s largest threat-detection network and machine-learning malware protection into a single, lightweight malware scan and removal tool that won’t slow down your PC. And did we mention, it’s 100% free?

It’s not a popularity contest, but...

When so many pros trust and recommend us, we must be doing something right in the fight against rootkits.


A rootkit scanner trusted by over 400 million users

But don’t just take our word for it.

Protect your Mac and Android, too

Rootkits don’t care what device you use, which means Macs and Androids aren’t safe either – unless they enjoy Avast’s powerful protection.

For your Mac, we have free Avast Security for Mac, which hunts down and destroys rootkits, as well as any other threat that has taken over your machine. We even take your security one step further by constantly scanning your wireless network for any unwelcome visitors.

For your favorite Android devices, we have another free solution: Avast Mobile Security for Android. Enjoy your phone fearlessly knowing it has the world’s most powerful antivirus protecting it, and take it out of the house without a care thanks to our battery-saving and anti-theft tools.

Download our free rootkit scanner and remover

Say “goodbye forever” to rootkits and other threats with Avast Free Antivirus — at the low, low price of free.


How do I find rootkits?

Rootkits are designed to avoid easy detection, often by hiding inside legitimate software. The most reliable way to find them is to trust an expert tool, like Avast Free Antivirus, that specializes in sniffing them out. 

What do rootkits do to your computer?

In short, rootkits allow hackers to access parts of your device that they — or even you — aren’t normally allowed to reach. This gives them unfettered control over your system, which means they can basically do whatever they want.

Why are rootkits dangerous?

They don’t have to be: sometimes advanced users use rootkits to exercise greater control when customizing their own machines. But if someone has installed a rootkit on your device without your knowledge, it means they can basically exert absolute control over your device… which, when used by criminals, is universally bad.

System requirements

We’re not demanding. All you need is a PC with Windows 10, 8.1, 8 or 7*, 1 GB RAM 
and 2 GB of hard disk space. And that’s it.

* Both the 32- and 64-bit versions, excluding Starter and RT editions.

Windows 10 compatible

Get free threat protection for your iPhone with Avast Mobile Security


Protect your PC against rootkits and other threats with Avast Free Antivirus


Protect your Mac against malware and other threats with Avast Security


Protect your Android against rootkits with Avast Mobile Security