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New online threats emerge every day, putting our personal information, money and devices at risk. In its 2024 Internet Crime Report, the Federal Bureau of Investigation reports that 859,532 complaints of suspected internet crime—including ransomware, viruses and malware, data breaches, denials of service, and other forms of cyberattack—resulted in losses of over $16 billion—a 33% increase from 2023.
That’s why it is essential to stay ahead of these threats. One way to combat these is by conducting virus scans using proven software tools that constantly monitor and check your devices while safeguarding your sensitive information. In this article, we’ll go through everything you need to know to run a scan effectively to keep your computers, phones and tablets in tip-top shape.
Whether you think you might have a virus on your computer or devices or just want to keep them running smoothly, it’s easy to do a virus scan.
Each antivirus program works a little differently, but in general the software will look for known malware with specific characteristics, as well as their variants that have a similar code base. Some antivirus software even checks for suspicious behavior. If the software comes across a dangerous program or piece of code, the antivirus software removes it. In some cases, a dangerous program can be replaced with a clean one from the manufacturer.
Before doing a virus scan, it is useful to know the telltale signs of viral presence in your device. Is your device acting sluggish or having a hard time booting up? Have you noticed missing files or a lack of storage space? Have you noticed emails or messages sent from your account that you did not write? Perhaps you’ve noticed changes to your browser homepage or settings? Maybe you’re seeing unexpected pop-up windows, or experiencing crashes and other program errors. These are just some signs that your device may have a virus, but don’t get too worried yet because many of these issues can be resolved with a virus scan.
Free virus scanner tools, both in web-based and downloadable formats, offer a convenient way to perform a one-time check for malware. They are most useful when you need a second opinion or are asking yourself, “do I have a virus?” after noticing something suspect.
However, it’s critical to be cautious. For one, cybercriminals often create fake “free” virus checker tools that are actually malware in disguise. If you opt for free scanning tools, it is best to lean on highly reputable cybersecurity brands. On your app store or browser, navigate to a proven online scanning tool with good reviews or a website whose URL starts with “https” to confirm you are in a secure location.
Secondly, free tools are frequently quite basic and perform only the minimum required service. If you choose to go this path, look for free trial versions that offer access to the full suite of premium features, including real-time protection, a firewall, and a VPN. This will give you a glimpse of a solution’s comprehensive, multi-layered security capability before you commit to a subscription.
If safeguarding all your computers and mobile devices individually sounds overwhelming, you can opt for comprehensive security products that protect computers, smartphones and tablets from a central, cloud-based hub, making virus prevention a breeze. Many of these modern antivirus solutions are powered by both local and cloud-based technologies to reduce the strain on your computer’s resources.
This guide will walk you through the simple steps to safely scan your computer using reliable online tools, helping you detect potential threats, and protect your personal data.
When selecting the right antivirus software, look beyond a basic virus scan and consider these key features:
The process of checking for viruses depends on the device type and its operating system. Generally, however, the virus scanner will display a “Scan” button to start the process of checking your system’s files and apps.
Here are more specific tips to help you scan your computers, phones and tablets:
If you use Windows 11, go into “Settings” and drill down to the “Privacy & Security > Windows Security > Virus & Threat Protection” tab, which will indicate if there are actions needed. This hands-off function is Microsoft’s own basic antivirus solution called Windows Defender. Built directly into the operating system and enabled by default, this solution provides a baseline of protection at no extra cost for casual Windows users. However, Microsoft is the first to admit that it lags behind specialized paid products in detecting the very latest zero-day threats.
Mac computers don’t have a built-in antivirus program, so you will have to download security software to do a virus scan. As mentioned, free antivirus applications are available online, but we recommend investing in trusted software that is proven to protect you from cyberthreats.
If you decide to invest in more robust antivirus software, running a scan is usually straightforward and intuitive. For more detailed instructions, we suggest searching the software’s help menu or going online and following their step-by-step instructions.
Smartphones and tablets are powerful devices that you likely use for nearly every online operation in your daily life from banking, emailing, messaging, connecting, and storing personal information. This opens your mobile device to getting infected through malicious apps, especially those downloaded from unofficial stores, phishing links sent via text or email, or by connecting to compromised wi-fi networks.
Regular virus scans with a mobile security software are crucial for protecting your devices. Be aware, however, that Android and IOS operating systems merit distinct solutions.
Antivirus products for Android devices abound due to this system’s open-source foundation. However, due to Apple’s strong security model, which includes app sandboxing, traditional viruses are rare on iPhones and iPads. However, these devices are not immune to all threats. You can still fall victim to phishing scams, insecure Wi-Fi networks, and malicious configuration profiles. Signs of a compromise can include unusual calendar events, frequent browser redirects, or unexpected pop-ups.
Apple devices, however, closed platform doesn’t easily accommodate third-party applications, especially unvetted ones. You will most likely find robust and verified antivirus scanning tools on Apple’s official app store.
Before you open any downloaded file or email attachment, it’s wise to check it for threats. To perform a targeted virus scan on a single file, simply right-click the file in Windows Explorer or macOS Finder and select the “Scan” option from the context menu to run the integrated virus checker on a suspicious item.
For an added layer of security, especially involving files from unknown sources, you can use a web-based file-checking service that scans for malware. These websites let you upload a file, which is then analyzed by multiple antivirus engines. Many security-conscious email clients also automatically scan incoming attachments, but a manual scan provides crucial, final-line defense before execution.
Once the scan is complete, the tool will display a report of any threats it found, including the name of the malware and the location of the infected file. If your antivirus software alerts you to a threat, don’t panic—it means the program is doing its job.
The first and most critical step is to follow the software’s instructions. It might direct you to quarantine the malicious file to isolate the file in a secure vault where it can no longer cause harm. You can then review the details of the threat provided by your virus scanner and choose to delete the file permanently, which is usually the safest option.
After the threat is handled, ensure your antivirus software and operating system are fully updated. Finally, run a new, full system virus scan to confirm that all traces of the infection have been eliminated. Regularly backing up your important data to an external drive or cloud service can also be a lifesaver in the event of a serious infection.
The most effective way to maintain your device’s security is to automate your defenses. A quality antivirus suite allows you to easily schedule a regular virus scan so you’re always protected without having to do it manually. A daily quick scan is a great habit for any user; it’s fast and checks the most vulnerable parts of your system. Most antivirus products regularly scan your computer or device in the background, so a manual scan is only needed if you notice something dubious, like crashes or excessive pop-ups. You can also set regular scans on your schedule, but a weekly full scan is ideal.
These days, it is essential to stay ahead of the wide variety of continuously evolving cyberthreats. Your first line of defense against these threats is to regularly conduct a virus scan. You can choose among the many free yet limited-time products or comprehensive, cloud-based solutions.
While many free versions legitimately perform their intended function, it’s critical to be cautious as these are more often baseline solutions while some are malware in disguise. They also lack the continuous, real-time protection necessary to block threats proactively.
A better option is to invest in verified, trustworthy, and all-in-one antivirus products like McAfee+ that, aside from its accurate virus scanning tool, also offers a firewall, a virtual private network, and identity protection. For complete peace of mind, upgrading to a paid solution like McAfee Total Protection is essential for proactively safeguarding your devices and data in real-time, 24/7.
The post How To Do A Virus Scan appeared first on McAfee Blog.
If your PC runs on Windows 10, you’re in very good company. The Microsoft operating system is the most widely used OS in the world.
However, the rollout to Windows 11 began in 2021, with Windows 10’s support lifecycle ending on October 14, 2025. After this date, Microsoft will stop providing free security updates, technical support, or software updates for Windows 10. If you are a Windows 10 user, this means you will need to upgrade to the newer OS or purchase extended security updates to continue using the old OS securely.
Unfortunately, its success as a widely used operating system makes Windows attractive to hackers. If malicious software could make a home in Windows, a lot of targets would ask how best to protect your Windows 10 or 11 device. Should you just use Windows Security — Microsoft’s free version of antivirus software — or buy additional protection?
Read on to learn what Microsoft Security covers and how additional virus protection can secure all of your connected devices.
Windows Defender is a free antivirus tool that’s built into the Windows operating system. Initially released as an anti-spyware program for Windows XP and Windows Server 2003, it became a full antivirus program with Windows 8 in 2012.
Today, Windows Defender antivirus is part of the Windows Security suite, which offers a comprehensive solution that includes Windows Firewall and Smart App Control for real-time protection against threats. While it’s considered one of the best free antivirus software programs, Windows Defender doesn’t have any extra features that might come with paid security software. If you’re just looking for good antivirus software, it can get the job done.
If you’re not using third-party antivirus protection, you’ll want to make sure that your Windows Defender antivirus coverage is working on your computer. Here’s how to check:
To make sure your Windows Security is running, follow these steps:
Windows Defender is a convenient and cost-effective way to protect your Microsoft device from viruses. With features like real-time protection, firewall integration, and cloud-based threat detection, it provides a solid baseline of security for your computer. This overview explores what Windows Defender does well and where it falls short:
While Windows Defender has vastly improved, it still has some limitations compared to other comprehensive security and antivirus suites.
While Windows Security and Windows Defender offer robust baseline malware protection, modern digital threats go far beyond simple viruses. To stay truly safe, you need to look at the bigger picture of online security. This is where a comprehensive security suite offers significant advantages over a standalone antivirus tool.
Here’s a quick comparison between the built-in Windows Defender and what a full-featured security suite offers:
| Feature | Windows Defender | Comprehensive Suites |
| Antivirus & malware protection | Yes (strong baseline) | Yes (advanced) |
| Firewall | Yes | Yes (advanced, customizable) |
| Secure VPN | No | Yes |
| Identity monitoring | No | Yes |
| Cross-device protection (Mac, Android, iOS) | No | Yes |
| Password manager | Limited (browser-based) | Yes (secure, cross-device) |
| Web protection | Yes (Edge browser) | Yes (all browsers) |
Cybercriminals constantly develop new malware, sophisticated phishing scams, elaborate ruses and zero-day exploits that target your behavior—like tricking you into clicking a malicious link, downloading a compromised file, or giving your personal information such as your bank and credit card numbers. Some scams even target your devices with risky apps or links on social media.
As thousands of new threat variants are discovered daily, having dedicated and up-to-date virus protection for Windows 11 is essential for comprehensive security. Ultimately, you don’t need to disable Windows Defender’s firewall, but adding a comprehensive security suite provides crucial layers of protection against phishing, identity theft, and unsecured Wi-Fi that are essential for staying safe online today. Having another antivirus program can make sure you have real-time protection and access to the latest security features. Better to be safe than sorry!
From Windows 10, the upgraded Windows 11 introduces significant security enhancements, thanks to a more robust security architecture that applies stricter hardware requirements. Mandatory features such as Trusted Platform Module (TPM) 2.0, Virtualization-Based Security (VBS), and Secure Boot create a much stronger “secure-by-default” defense against attacks that target the boot process and system integrity.
However, this enhanced baseline security does not eliminate the need for more diligent protection. The vast majority of cyberattacks target the user, not the hardware. Cybercriminals still employ phishing emails, malicious downloads, and insecure websites to compromise your device, regardless of the operating system’s strength. While it’s true that Windows 11 has made great strides in security, the threat landscape has evolved even faster. Installing a multi-layered security solution remains a critical tool for proactively protecting your personal data and online activities.
In Windows 11, you can augment the built-in Windows Defender with a free antivirus option, but it’s important to understand the trade-offs. Free antivirus solutions typically offer only basic malware protection and lack crucial features that are standard in paid suites, such as a secure VPN, identity monitoring services, advanced phishing protection, a password manager, and dedicated customer support. Some free software may also collect and sell your browsing data to third parties to generate revenue.
While free is tempting, investing in a paid suite with total protection provides peace of mind, knowing that all aspects of your digital life—from your device security to your personal identity and online privacy—are actively protected by an integrated, powerful solution.
Using Microsoft’s built-in antivirus software can protect your Windows devices from viruses and malware. Follow these basic Windows Defender management steps:
In most cases, you can retain your third-party antivirus when you move to Windows 11. Reputable antivirus providers ensure their software is fully compatible with new operating system releases. Before you upgrade to Windows 11, ensure your antivirus software is updated to the latest version. Your subscription should carry over to the new OS seamlessly.
The benefit of using a cross-platform security suite is that your license and protection extend beyond a single OS version. Whether you’re on Windows 10, Windows 11, a Mac, or a mobile device, your protection remains active and managed from a single account, avoiding the hassle of finding new software or purchasing new licenses every time you upgrade or change devices.
Windows Defender provides a solid starting point of security for your computer, but it is good to reinforce that capability with a comprehensive solution. Antivirus protection programs available in the market today aren’t all created equal. When looking for the best antivirus software for your needs, here are some things to consider for your devices running on Windows 11.
Today’s cybercriminals are relentlessly creating new threats every day to steal your identity, money, and personal data. Thinking of antivirus as just for viruses is outdated; modern security suites are about total digital wellness. McAfee+ was developed with an understanding of how cybercriminals operate. Our all-in-one protection includes:
Whether you’re using Windows 10 or the latest Windows 11, the built-in Microsoft Defender provides a good starting point for your device’s security. However, an antivirus is just one layer of security. To be truly protected from the full spectrum of today’s online threats, you need a more comprehensive approach. Adding a trusted security suite gains you layers of protection for your identity, privacy, and data that go far beyond basic antivirus defense.
When you install a third-party antivirus like McAfee Total Protection, it seamlessly takes over as the primary real-time protection provider, while Windows Defender can remain available for periodic scans, ensuring there are no conflicts. To check your security status, simply navigate to Windows Security > Virus & threat protection to see which provider is active.
For complete peace of mind, comprehensive solutions like McAfee Total Protection add critical features like a VPN for online privacy, identity monitoring, and protection for all your devices, not just your Windows personal computer.
The post Does Windows 10 or 11 Need Antivirus Software? appeared first on McAfee Blog.
Yes, giving your PC a good, old-fashioned cleaning can improve its performance. And it only takes minutes.
For the most part, PCs don’t slow down on their own over time. It’s the way we amass apps, files, and services that slows things down as your PC ages.
A few examples come to mind:
So, if your PC is feeling a bit sluggish — or if you’ve never cleaned your PC before — you have a few options to speed things up.
Start by backing up your files and photos
Any time you do some upkeep on your PC, back up your stuff. Given that so many of us store our files and photos in the cloud, this step is easy. You already have backups. Give those files a quick review and make sure what you need is backed up in the cloud.
You can also create a physical backup. An external drive can store those files as well, giving you extra redundancy. With your backup in hand, you can store it securely elsewhere in the event you need it.
Delete old apps
Drop over to your Windows search bar and type in “Storage.” That’ll take you to a screen that gives some solid insight into what your drive space looks like.
The great thing about this screen is that you can jump right in and get to work. For example, by clicking the “Apps & features” option, you get a list of all your apps stored on that drive. And with a click, you can delete the old ones you don’t want.
This does you well in a couple of ways. One is the obvious disk space you regain. The second is a bit more subtle. Older apps might go without an update, which can lead to security loopholes that hackers can exploit. Remove the old app, and you remove the loophole.
Remove temporary files
From the same menu, you can click and see how much space temporary files are taking up. You’ll likely see several categories of temporary files that you can delete. Take close note, though. While temporary, some of them still offer benefits. For example, you might want to keep “Windows update log files,” in the event you ever need to troubleshoot Windows.
Clear your browser cache and cookies
This one is a bit of a double-edged sword. Your cache and cookies make many web pages load faster. By storing images, preferences, and other info, cookies speed up load times. However, as months go by, cookie data can get bloated. If the disk space they use looks a little high to you, clean them out. You can do this in Windows by typing “Cookies” in your search bar. Additionally, you can clear it from your browser’s menu.
Important: This can remove any saved passwords stored in your browser. However, if you’re using a password manager, this isn’t a worry. The manager does the remembering for you.
Shut off startup apps that slow you down
Windows runs several apps on startup, some of which you certainly need, like antivirus apps or online protection software. Others might find themselves in that mix too, with apps that you don’t need running right away. These can slow down startup and eat up resources.
Head to your Windows search bar and type “Startup.” When the result pops up, select “Startup Apps.” From there, you’ll see a list of all your startup apps. You’ll also see a quick readout on each app that shows its impact on performance. Scroll through and click off the apps you don’t want to load at startup. Consider them carefully, though. If you’re uncertain of what a startup app does, do a web search on it before making any changes. Or just leave it alone.
Completely erase sensitive files
You’d think that deleting files in the recycle bin erases them entirely. Not so. It removes the “pointer” to those files. The data remains on the drive. It only gets removed when something new overwrites it. Which can take time.
To completely erase files with sensitive info, use a product like our own File Shredder. It permanently deletes files, and you find it in our McAfee+ plans. Although this doesn’t necessarily improve performance, it helps prevent identity theft.
Consider a deeper clean with a PC Optimizer
PC cleaning software, like McAfee PC Optimizer, simplifies the process of cleaning your PC. These programs are designed to detect and clear out unnecessary files, manage startup apps, and even clean the registry, often at the press of a button. It’s crucial, though, to choose reliable and safe PC cleaning software. Some can be excessive, doing more harm than good, or even carry malware. Reading reviews and understanding what each feature does is important before using PC cleaning software.
These cleaners usually come with customizable settings to suit your preferences. You can set automatic clean-ups at regular intervals, thus saving time, and freeing you from the hassle of remembering to run the cleanup.
A clean slate for you and your PC
Cleaning your PC is an essential part of maintaining its performance. While it might not drastically increase your PC’s speed, it contributes to overall efficiency, responsiveness, and longevity.
It’s important to approach PC cleaning carefully, deleting with discretion to avoid accidentally removing necessary files or applications. For those who aren’t comfortable doing it manually, reliable PC cleaning software like McAfee+ can simplify the process and save time.
Regular cleaning keeps your PC running smoothly, prevents potential threats, and ensures your personal and sensitive info is safe. So, if you haven’t started yet, it’s never too late to begin cleaning your PC and enjoy an optimized computing experience.
The post Does PC Cleaning Improve Performance? appeared first on McAfee Blog.
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