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.
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:
Ruin a rootkit’s day
Rootkits trying to access your system will find it impossible to infiltrate Avast’s defenses.
Nonstop innovation
New rootkits are created every day. So we update our protection every few minutes to ensure you stay safe from the very latest threats.
Stops other threats
No matter what kind of attack threatens your PC or your data, Avast is equipped to deal with them all.
Tested by pros and users alike
After rigorously testing 18 of the world's most popular antiviruses, independent test lab AV-Comparatives has awarded Product of the Year 2018 to Avast Free Antivirus.
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?
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.
The UI for your software - amazing. Great work over the years. Can't say enough good things!
Ryan R.
Thank you, Avast, for the excellent work you do. I run your antivirus software on both my Mac OS X and my Windows machines. You have the best products on the market, period.
Eric S.
I’ve been using Avast for over a year and have found it one of the best free software protection devices on market.
Daryl C.
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.
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.