Signs That Your Computer May Have a Virus Infection
Before we dive into some telltale signs of a virus or malware infection on your computer, it’s important to note that no single symptom is definitive proof of an infection. These are simply common warning signs that you should be aware of.
Slow Performance
If you notice that your device has slowed down significantly in the recent past, it could be a sign that your system is infected with a virus or other malware. These malicious programs often run several background processes that consume CPU, RAM, and disk resources without your knowledge.
However, system slowness can also be perfectly normal. A computer that is too old, has too many applications installed, or has numerous startup programs running may naturally deliver sluggish performance.
That said, if the drop in performance cannot be explained by your system’s age or recent application installations, it could be a cause for concern. For example, if your system runs slowly even when you have only a few apps open, or if it takes an unusually long time to launch your programs, it may be because malicious software is consuming your system resources.
If you suspect that malware or a virus is causing your system to slow down, an antivirus solution such as Norton 360 Deluxe may help you identify potential issues using its performance monitoring tools.
Lots of Pop-Ups
Seeing a lot of pop-ups on your computer can not only be super frustrating, but worse still, it might be a sign that a virus or other malware is affecting your device. These pop-ups often mimic urgency-inducing messages, such as “Your computer is infected” or “Click here to claim your $100 reward.” Why? Because the bad actor wants you to click them without a second thought.
However, clicking on these urgent-looking messages may redirect you to another website, prompt you to install malicious software, or trick you into entering your personal information on legitimate-looking login pages. These are common tactics used in phishing attempts.
Norton 360 Deluxe, like certain other top antivirus solutions, includes real-time protection designed to help detect and block certain online threats. Some antivirus programs even maintain a list of malicious URLs and may warn you beforehand.
However, not all pop-ups are malicious. Legitimate pop-ups are generally related to the particular website you are visiting and are often used to give cookie consent notices, browser permission requests, or newsletter sign-ups. But if you see such pop-ups even when all your browsers are closed and you are working offline, then it could be a reason to investigate further for a potential virus infection.
Frequent Crashes or Reboots
Frequent system crashes or unexpected reboots can also be signs of a virus or malware infection. That’s because malicious software can corrupt system files, destabilize the operating system, or conflict with legitimate software, leading to frequent freezes and crashes.
Windows users might even encounter the infamous Blue Screen of Death (BSOD), which can sometimes be caused by malware. Frequent reboots, for example, can have various causes, including malware or unauthorized system activity by a cybercriminal.
If you continue to experience frequent system crashes, running a full system scan with an antivirus solution such as Norton 360 Deluxe can help identify viruses that may be contributing to operating system instability.
That said, not all crashes can be directly attributed to malware. Improper device configurations, hardware failures, overheating, or driver issues are also common causes of crashes and unexpected reboots.
Suspicious Browser Changes
One potential warning sign that your computer has been infected with a virus or malware is changes to your browser that you did not make. If your homepage or default search engine has been changed without your permission, or new toolbars, extensions, or icons appear out of nowhere, you might be facing malware or other unwanted software making these changes without your knowledge.
Cybercriminals often alter browser settings to redirect users to malicious websites full of malware and other malicious content. You can visit your browser’s settings to check whether there has been a recent update from the browser provider.
Sometimes, updates or reinstalls can add new browser elements. An antivirus solution like Norton 360 Deluxe includes browser protection that blocks dangerous sites and removes the underlying malware or adware causing browser issues. However, you must still manually delete unauthorized browser extensions and manually reset your browser settings to their defaults.
Missing or Corrupted Files
You may sometimes notice that your system files are missing, renamed, or simply won’t open because they have been corrupted. Certain types of malware, especially ransomware, can encrypt or corrupt your files, potentially rendering them unusable.
Ransomware is a more serious type of malware, and it can be worth seeking professional help instead of paying the cybercriminal outright. Unfortunately, even if you pay the ransom, there is no guarantee that your files will be restored or become accessible again.
Unexplained Network Usage
Unusual network activity can also be a sign of a virus or malware infection. If you notice high network usage in your Task Manager or Activity Monitor, especially when your system is idle, it might indicate that malicious software is running in the background.
Such malware can require network access to exfiltrate stolen data, such as passwords or files, or download additional malicious payloads. Unexplained bandwidth consumption or persistent network activity could be a reason to investigate further.
However, legitimate background processes, such as operating system updates or cloud syncing, can also cause increased network activity. Check whether any of your software was updated while your system was idle or whether you have enabled cloud syncing during specific times of the day.
If none of these legitimate explanations apply, there is a chance that you’re dealing with a virus infection. A good way to investigate further is by using a professional antivirus solution like Norton 360 Deluxe, which offers a built-in firewall that can monitor network traffic and flag suspicious connections and unusual network activity.
What You Should Do If You Suspect a Virus Infection
Having outlined the top signs to watch out for when suspecting a malware infection, here are a few steps you can take to mitigate the situation. Do keep in mind, however, that none of these methods is a guaranteed way to disinfect your system, and their effectiveness will depend on the severity of the infection.
Disconnect from the Internet
The first thing you should do is disconnect your device from the internet. This can help prevent an attacker from exfiltrating data, including personally identifiable information such as your name, email address, or physical address, to their servers or downloading additional malicious payloads onto your device.
Set up an Antivirus
If you are not already using an antivirus, this might be the right time to get a reliable protection solution such as Norton 360 Deluxe. Antivirus software scans your system for known viruses, malware, and other threats, including in real time.
Advanced antivirus solutions also use behavioral and heuristic analysis to identify suspicious activity on your system. They can then help isolate and remove the malware before it spreads to other parts of your device and causes further damage.
Run a Deep Scan
Most antivirus programs offer two types of scans: a quick scan and a full (deep) scan. While a quick scan checks common infection points and is much faster, a full scan thoroughly examines your entire system for malicious or infected files. Although it takes longer to complete, it can be worth running a full scan if you notice signs of a suspected malware infection.
It’s also important to review the scan results so that you know which files and system locations, if any, were infected. This can help you understand how the infection occurred and reduce the risk of repeated infections.
Seek Additional Support
If the symptoms worsen or you continue to notice signs of infection even after running a full scan, you may need professional help instead of relying on DIY solutions. Professional IT consultants and service providers can help clean your system and remove the malware. As a last resort, a clean operating system reinstall may be the only effective way to recover from a severe infection.
Conclusion
Virus infections can be frustrating and interfere with your day-to-day work. In severe cases, they may even render your system unusable, compromise your data, and lead to risks such as identity theft and financial fraud.
If you notice symptoms such as unexplained slow system performance, numerous malicious pop-up ads, frequent system crashes or unexpected reboots, or browser changes that you did not make, there is a chance that your system could be infected with malware.
This is why it’s important to use a reliable antivirus solution such as Norton 360 Deluxe, which can help protect you against viruses, ransomware, and other types of malware. Such a solution includes scanning features that can scan your system for potential threats and quarantine detected threats, helping protect your system.
