UPDATE: When Google và Mozilla removed Avast’s website extension from their stores, a scandal broke out which revealed that Avast (who also owns AVG) had allegedly been spying on their users’ browsing data & selling it lớn corporations for millions of dollars in profit. In light of these unethical practices, we can no longer recommend them on our site. You can read more about the controversy and our decision here. For a menu of antivirut companies we bởi recommkết thúc, please see this danh mục of the 10 best antiviruses of 2021.

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Original Review: How secure is secure enough? Avast seems khổng lồ be betting that you’ll want all the security bells và whistles that you can afford, but its paid tiers seem to be offering too little for the price. With that said, the không tính phí tier of Avast offers a fantastic antivirut engine at its core (PLEASE NOTE THE ABOVE UPDATE). You’ll love the security of Avast, as well as the tốc độ with which it reacts khổng lồ detect và mitigate dangerous programs – just try not lớn get too frustrated by its incessant pleas for you khổng lồ upgrade.


As mentioned, Avast went above sầu và beyond when it came time to lớn kiến thiết the không tính tiền version of their antivi khuẩn hàng hóa. Even the basic vi khuẩn scan offers more functionality than most. Instead of just searching for viruses và malware, it also detects out-of-date software, malicious browser add-ons, network issues, unprotected sensitive documents, & weak passwords.


My first scan detected no malware, bad extensions, or network issues, but it did find vulnerable software, unprotected documents, và weak passwords. I’m not surprised that there’s vulnerable software on my computer – I have sầu a lot of software & it’s a pain to update it all – but these last two items gave sầu me a little bit of pause. What does Avast count as unprotected sensitive documents và how vày they find them? Furthermore, how vì chưng they check the strength of my passwords?

As it turns out, the sensitive sầu documents scan is highly effective sầu. It found tax records, employment documents, financial statements, and more – stuff I’ve stored on my computer without even remembering that I’ve sầu put it there. In all, it only detected two false positives. Avast sorted these documents inlớn categories such as taxes, payroll, employment, and travel (documents such as driver’s licenses & passports. It also gives you an easy button lớn the right of each entry that instantly shows you the location of each document that it finds.

Reading between the lines of the sale copy, Avast seems khổng lồ be leveraging a technology known as Data Loss Prevention (DLP). DLPhường is a tool that’s normally used in the context of large companies that store customer data such as credit card và social security numbers. Using DLPhường, companies can scan word documents and conduct optical character recognition (OCR) on PDFs in order khổng lồ detect strings of numbers that resemble these sensitive bits of data. The company can then know exactly where its sensitive sầu data is và take steps to lớn ensure that no one moves or deletes it.

Simply knowing the location of my sensitive data is very useful & seeing DLPhường technology move from a corporate lớn a consumer context is interesting to say the least. There’s unfortunately not a lot that you can vì chưng with this information without locking yourself inkhổng lồ a subscription, however. Once you vì chưng subscribe, you get the option to encrypt your information và store it in a secure digital locker. If any attacker attempts lớn move sầu or delete these files, the program blocks access và notifies the user.

Avast’s weak password scan is frankly a bit of a letdown. I was expecting the service to tell me that I’d phối one of my passwords to “123cat” or something equally simple by using some sort of futuristic hash-scanning algorithm. Instead, it just told me that I’m storing passwords in my browser (everyone does), that this method is potentially insecure (jury’s out on that), & that I should upgrade in order khổng lồ use Avast Passwords, Avast’s password management service. This may certainly be useful, but it’s not worth committing to lớn a yearly subscription when you could just use one of the best password managers that are already available elsewhere. (More on this later.)

Does the Antivirut Engine Make the Grade?

All of these extras are frankly a distraction from the core of the scan itself – the malware detector. Independent lab tests show that Avast has a highly-rated antivi khuẩn engine, demonstrating advanced features & flagging zero false positives. Few antivirus engines scored higher. In addition, testing-under real-world conditions shows that Avast is efficient at detecting and mitigating the vectors – such as drive-by-downloads & code injection attacks – by which malware propagates. To summarize, Avast will detect most forms of advanced malware, và prevent most of them from even installing on your computer. If any malware gets by, an automatic scan will usually detect & destroy the infection within a day.

When malware attempts lớn exexinh đẹp on a computer, Avast springs inkhổng lồ action. It will detect most known malware samples immediately, then quarantine và delete them. If Avast detects an unknown tệp tin that acts suspiciously, Avast kills the process & analyzes the malware sample at its corporate headquarters. If you suspect that Avast has missed a tệp tin, you can right-clichồng on any tệp tin in your Windows Explorer panel and select the tệp tin or thư mục for individual scanning.

More importantly, Avast is very good at making sure that malware doesn’t get onto lớn your computer in the first place. It detects most sites that attempt lớn distribute malware before they start downloading onto your computer. For the rest, Avast will interrupt the malware sites during the tải về stage – missing only a few files, which will usually be caught by Avast’s active sầu protection once they attempt to lớn exeđáng yêu.

Phishing sites – sites that attempt to duplicate banking login screens và social truyền thông media – are far more comtháng than malware sites, as well as being a bit simpler lớn produce. It’s arguably more important to protect users from these sites than it is to lớn protect them from sites dedicated khổng lồ malware. Although this is a paid feature, Avast has the ability khổng lồ protect users from phishing sites with surprising efficiency. Their software doesn’t just blochồng sites that have already been blacklisted – they also can identify phishing sites that are too new khổng lồ have been identified by security researchers.

To summarize, the không tính tiền version of Avast offers security that’s among the best that I’ve ever seen. You’d almost expect that its designers would have sầu turned something off to make the paid upgrade more essential, but they haven’t. Its paid features, including a locker for your passwords and an encryption option for sensitive files, just don’t add more to the table.


Outside of the core antivirus function, Avast offers a host of features in both its miễn phí và paid versions that are designed to lớn keep your data secure. These features range from the expected khổng lồ the exotic, with many of the paid features being perhaps more useful khổng lồ power users. Here’s the rundown:

Free Features are Critical khổng lồ Online Security và Quality of Life

First of all, Avast offers a series of advanced security scans. This is distinct from the “Smart Scan” that you see on the program’s main menu. When you cliông xã on the “protection” tab, you’ll see a variety of options, including “Full Virus Scan” and “Boot-Time Scan.”

Full Virus Scan is both slower và more thorough than the primary smart scan. Although it takes quite a bit longer – up khổng lồ a couple of hours on a slower machine – it has a better chance of detecting and resolving threats. If you suspect that your computer was infected by malware prior lớn installing Avast, you’ll likely want to lớn vày a Full Virus Scan in order to lớn weed out any lingering threats.

You’ll also want lớn run a Boot Time Scan. Many advanced kinds of malware now have the ability to lớn persist even when their files are deleted from your computer’s operating system. That’s because these viruses exist outside the primary OS. When they’re deleted, they simply reinstall themselves from files that are outside the operating system. A Boot Time Scan restarts your computer và watches for suspicious programs that try khổng lồ exeđáng yêu while the computer is running, & then stops them in their tracks.

Lastly, Avast offers a full-featured WiFi scanner designed khổng lồ protect you at your trang chính và on the go. When I ran it, it discovered every device connected khổng lồ my WiFi in under a minute – my desktop, máy tính, console, cellphone, & kitchen speaker. If my devices were unsecured, it would have sầu pointed out vulnerabilities such as ports exposed lớn the mạng internet, default passwords, & other weaknesses.

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Paid Features Don’t Add Enough Value

Outside of these advanced vi khuẩn scanning features, Avast doesn’t offer much – but it’s not clear that you’d need much more anyway. For example, there’s a utility that’s supposed to clean your computer’s hard drive sầu, for example, but it’s paid for. Meanwhile, CCleaner is không lấy phí. Want khổng lồ get rid of particularly sensitive materials? Avast offers a secure erase function that can delete a file by writing over it many times, removing all trace of it from your computer. The system works as advertised, but it’s hard lớn see who needs it other than security researchers. There’s a VPN add-on that you can pay for, but other standalone VPNs offer similar features for less.

To summarize, Avast has won me over with its miễn phí version, but it has lost its balance when it comes khổng lồ paid và premium pricing. The features here won’t make you much more secure than the không tính phí software, and you can replicate most of their functionality with miễn phí or lower-cost third tiệc ngọt software.

Ease of use

This is an area where Avast frustrated me. I realize that if you’re an antivi khuẩn company, you need to make money by converting your không tính phí users to paid subscribers. I really shouldn’t mind that Avast takes every opportunity to lớn get me to lớn upsell – and for the most part, I don’t. What irks me, however, is the liberal use of dark-pattern UI in order to lớn get me khổng lồ pay up.

If you’re unfamiliar with dark-pattern UI, here’s a quiông xã example.

When you boot up Avast, you get a splash screen a big “scan now” button in the middle & a White box offering you a welcome gift.


The “gift” turns out to be a steep discount on a subscription. What if you don’t want a subscription? As you can see from the screenshot below, there’s no “back” button, only a “buy now” option. In order to baông chồng out of the upsell screen you actually have sầu to clichồng the red X in the top right corner, something that’s counter-intuitive sầu lớn most users who think that button just closes the program.


When you hit that X, by the way, another pop up comes after it, offering you a không lấy phí trial.

Again, this is not a huge disappointment – because again, the service needs khổng lồ make money – and if that were the only example of that in the program, I probably wouldn’t mind. With that said, Avast goes a long way towards burying its goodwill by offering other confusing & intrusive sầu upsells buried in its software.

Here’s another example. In Avast’s “privacy” menu, you can see some options that are closed off with a big orange loông chồng, và some that aren’t. You’d expect that you’d have sầu to pay to unloông chồng features that are locked, & that the features that are unlocked would be miễn phí. That’s unfortunately not the case. When you cliông xã on SecureLine VPN, for example, a separate program installs itself on your computer, and then asks you for money. If you cliông xã on “Performance” và choose “Driver Updater,” the same thing happens. Avast takes you all the way inkhổng lồ installing a new program on your computer, và then asks you for money.


The most egregious example happened with the password manager, which is free but not great. The password manager operates as a Chrome or Firefox extension that stores your password and is secured with a master password, but it neither suggests svào passwords nor warns you about weak or duplicate passwords – something that’s a must in other products. You can’t even implement two-factor authentication.

Anyway, when I clicked through the menus that led into lớn the password management function, I decided to lớn decline to import my passwords into Avast’s password manager. Imagine my surprise when Avast started to import my passwords anyway! Although I was able to cancel the transfer, Avast also installed their proprietary secure browser on my machine – again without my permission.

This is a bit worrying. It doesn’t speak ill when it comes to the functionality of the antivirus engine itself, but for long-term users, the constant reminders khổng lồ upsell – plus the misleading menu options – may eventually become frustrating


Avast offers premium support services for its antivirut sản phẩm at every pricing tier. There’s an extensive knowledgebase that explains how its features work and what they’re supposed to do. These walk inexperienced users through the operation of the sản phẩm và allow them khổng lồ vì chưng some basic troubleshooting on their own.

The organization also boasts a 24/7 call center for more serious problems. The tech tư vấn specialists are able lớn provide detailed và helpful information within a short amount of time. This information should be helpful for both inexperienced users và power users alike.


When compared lớn other antivirus programs, Avast is roughly average in terms of expense. There are four main pricing tiers – Free, Internet Security, Premier, & Ultimate. If you’re determined to pay for Avast, Internet Security is probably the best option for you. It includes several useful quality of life features that the miễn phí tier lacks – a Real Site option that protects against phishing sites, a Ransomware Shield to lớn protect your files from encryption, a firewall that stops intrusion attempts, và an anti-spam feature.

Internet Security also includes one of the coolest features that isn’t included in the không tính phí version – the Sandbox mode. This lets you open files và programs in a virtual machine that doesn’t have access permissions to lớn your desktop. If the file contains malware, then the malicious program will exexinh tươi in an area where it can’t vì your computer any harm. This is a really neat little bonus, & it’s great for anyone who’s constantly receiving phishing attempts.

Meanwhile, the more expensive pricing tiers contain more of the software that’s nice to have, but not vital. Upgrading khổng lồ Premier gets you the superfluous data shredder & disk cleanup features, while upgrading to Ultimate gets you the VPN & the password manager. None of these are necessarily essential lớn your data security, and if you must have them, they’re available from third parties at a lower price for the same effectiveness.

Once again: the không tính tiền tier of Avast gives you all the information security you’re likely to need, but if you must upgrade, the Internet Security tier gives you most of everything else.