How to Tell if Your Laptop or PC Has a Virus
Get Suspicious Computer Problems Checked
Suspect your laptop or desktop has a virus, malware, or unwanted software? Computers for Change can diagnose and clean up Windows computers affected by malware, adware, browser hijackers, fake security warnings, and other unwanted programs. We’ll examine the problem, explain your options, and provide a quote before repair work begins.
What Windows Malware Can Look Like
Malware doesn’t always make itself obvious. Sometimes the first sign is a browser that suddenly redirects you, an unfamiliar program that appears at startup, or security settings that won’t stay enabled.
Other symptoms, such as a slow computer or frequent crashes, can have completely unrelated causes. Checking a few common areas can help you determine whether you’re dealing with a potential security problem or something else.
Watch for Unexpected Pop-Ups and Security Warnings
Unexpected pop-ups are one of the more noticeable signs that something isn’t right, but not every warning means malware is installed on your computer.
Be cautious if you notice:
- Pop-ups appearing repeatedly while browsing
- Full-screen warnings claiming your computer is infected
- Messages telling you to call a support number immediately
- Prompts asking you to download unfamiliar security software
- Ads appearing on websites that normally don’t show them
Some of these warnings are simply malicious webpages designed to scare you into calling a scammer, downloading software, or providing payment information.
If a webpage says your computer is infected, don’t call the displayed number or install anything it recommends. Close the page instead.
Check for Browser Redirects and Unfamiliar Extensions
A browser that suddenly behaves differently may be affected by adware, a browser hijacker, or an unwanted extension.
Look for changes such as:
- Your homepage changing without your permission
- Searches opening in an unfamiliar search engine
- Search results redirecting to unexpected websites
- New toolbars or browser extensions
- Unusual advertisements appearing on multiple websites
- Tabs or webpages opening by themselves
Check your browser’s extension or add-on settings and review what’s installed. If you see an extension you know you didn’t install, don’t provide it with additional permissions.
Look for Programs You Don’t Recognize
Some unwanted software installs alongside other programs or is downloaded after clicking a misleading advertisement or installer.
Open Settings > Apps > Installed apps and look through the programs on your computer. Pay particular attention to unfamiliar software that appeared around the same time your problems started.
Don’t automatically uninstall something simply because you don’t recognize its name. Windows computers often contain legitimate drivers, manufacturer utilities, and system components with unfamiliar names, so research the program first or have it checked if you’re unsure.
Check Windows Security
Windows includes built-in security tools that can scan your computer for viruses and other threats.
Open Windows Security and select Virus & threat protection. From there, you can check for current threats, review recent security activity, and run a scan.
Also pay attention if Windows Security:
- Won’t open
- Shows unexpected errors
- Reports that protection is disabled
- Keeps turning off after you enable it
- Detects the same threat repeatedly
Security software that unexpectedly stops working can warrant a closer look, especially when it’s happening alongside other unusual computer behavior.
Pay Attention to Sudden Performance Problems
A computer that suddenly becomes unusually slow can sometimes be affected by unwanted software running in the background.
You might notice:
- Programs taking much longer to open
- Frequent freezing or crashing
- Fans running heavily while the computer is idle
- Unusually high CPU or memory usage
- The computer becoming slow shortly after startup
However, a slow PC does not automatically mean you have a virus. Low storage, too many startup programs, Windows updates, aging hardware, and other software problems can cause similar symptoms.
If slow performance is your only symptom, start with our Why Is My Laptop or PC Running Slow? guide before assuming malware is responsible.
Watch for Missing, Renamed, or Inaccessible Files
Changes to your personal files can indicate a more serious problem.
If documents, photos, or other files suddenly won’t open, have unfamiliar extensions, or have been renamed without your involvement, stop and investigate before continuing to use the computer normally.
A message demanding payment to restore access to your files may indicate ransomware. Disconnect the computer from the internet and avoid interacting with the payment instructions until the computer can be evaluated.
Does This Mean Your Computer Definitely Has a Virus?
No single symptom proves that your computer has malware.
Pop-ups may come from browser notification permissions. A slow computer may have low storage or too many startup programs. Crashes can be caused by software conflicts or failing hardware, and an unfamiliar application may be a legitimate program installed by the computer manufacturer.
The more important question is whether something has changed unexpectedly, especially if several warning signs appear at the same time. If you’re unsure what’s causing the behavior, diagnosing the computer is safer than guessing at the solution.
Other Things Worth Trying
If your computer is still usable and you’re not dealing with ransomware or another serious security problem, there are a few basic checks you can safely make yourself:
If you entered a password into a suspicious website, change that password from a trusted device and enable two-factor authentication when available.
If you provided banking or payment information, contact your bank or card issuer as soon as possible.
When to Bring Your Computer In
If pop-ups keep returning, your browser continues redirecting you, Windows Security won’t work properly, or the computer still behaves strangely after basic troubleshooting, it may be time for a professional assessment.
Computers for Change can check Windows laptops and desktops for malware, adware, browser hijackers, unwanted software, and other problems that may be causing the symptoms. Depending on what we find, the appropriate solution could involve removing unwanted software, repairing Windows, cleaning up browser settings, or reinstalling Windows.
Most software repairs start at $99, and we’ll explain the recommended work and provide a quote before repair begins.
What to Expect When You Bring In Your Computer
You don’t need to diagnose the problem yourself before visiting our Burlington shop. Tell us what you’ve noticed, and we’ll help determine what’s causing it.
Tell Us What’s Happening
Bring your laptop or desktop to our shop and describe what changed. Pop-ups, redirects, unfamiliar programs, security warnings, slow performance, and anything you clicked or downloaded can all provide useful clues.
Walk-ins are welcome Tuesday through Saturday. If you’re bringing a laptop, bring its charger if you have it.
We Assess the Problem
We’ll evaluate the computer for malware, unwanted software, browser problems, Windows issues, and other possible causes of the symptoms.
The goal is to identify what’s actually wrong rather than assume every unusual behavior is a virus.
We Explain Your Options
Once we understand the problem, we’ll explain what we recommend.
Depending on the situation, that might involve removing unwanted software, correcting browser problems, troubleshooting Windows, or reinstalling Windows when cleanup isn’t the best option.
You Get a Quote
We’ll provide a quote before repair work begins. You can decide whether you want to proceed after you understand the recommended service and cost.
If the computer needs to stay with us for testing or diagnosis and you decide not to proceed with the repair, a $50 bench fee applies.
We Complete the Service
Once approved, we’ll perform the appropriate cleanup or repair and address related problems identified during the process.
We’ll let you know when your computer is ready.
What If Your Files Have Been Encrypted?
If your files suddenly become inaccessible and you see a message demanding money to restore them, you may be dealing with ransomware.
Disconnect the affected computer from the internet and avoid clicking links, contacting unfamiliar support numbers, or following payment instructions from the message. Bring the computer in for evaluation so we can determine what happened and discuss the available options.
Removing ransomware doesn’t necessarily restore encrypted files. Depending on the specific situation, recovery may require restoring files from a clean backup or exploring other data recovery options.
How Much Does Virus and Malware Removal Cost?
Most software repairs at Computers for Change start at $99, although the final price depends on what’s causing the problem and the work required.
If we can identify the issue at the counter, we’ll provide a free quote. If the computer needs to stay with us for testing or diagnosis and you decide not to proceed with the repair, a $50 bench fee applies.
We’ll explain what we find, what we recommend, and the expected cost before repair work begins.
How to Reduce Your Risk of Malware
You can’t eliminate every online threat, but a few everyday habits can reduce your risk.
Keep Windows, your browser, and other important software updated. Download programs from trusted sources, be cautious with unexpected email attachments and links, and avoid security or cleanup programs advertised through alarming pop-ups.
Use strong, unique passwords for important accounts and enable two-factor authentication when available. Regular backups are also important, particularly if your computer contains files you can’t easily replace.
Frequently Asked Questions
Can Windows Computers Really Get Viruses?
Yes. Windows computers can be affected by viruses and other types of malware, including adware, browser hijackers, ransomware, and unwanted software.
Not every computer problem is caused by malware, however, so diagnosis is important when the symptoms aren’t clear.
How Do I Know if a Virus Warning Is Real?
Yes, if the laptop has been tested, includes a warranty, and meets your needs. A refurbished laptop can cost less than a new one while still supporting everyday work, school, and home use.
Do I Need Third-Party Antivirus Software?
Choose a seller that tests its computers, explains their condition, and provides a written warranty. Buying locally also lets you inspect the laptop and ask questions before purchasing.
I Clicked a Suspicious Link. What Should I Do?
No. Walk-ins are welcome Tuesday through Saturday during shop hours.
Can You Remove Malware From My Computer?
We treat your personal data with care and do not browse or copy your files unnecessarily. If the repair affects your storage or operating system, we will first discuss backup and data transfer options.
Will I Lose My Files During Virus Removal?
We treat your personal data with care and do not browse or copy your files unnecessarily. If the repair affects your storage or operating system, we will first discuss backup and data transfer options.
Why Is My PC Slow if It Doesn’t Have a Virus?
We treat your personal data with care and do not browse or copy your files unnecessarily. If the repair affects your storage or operating system, we will first discuss backup and data transfer options.
Can You Remove Ransomware?
We treat your personal data with care and do not browse or copy your files unnecessarily. If the repair affects your storage or operating system, we will first discuss backup and data transfer options.
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Think Your Laptop or PC May Have a Virus?
If your Windows computer keeps showing pop-ups, redirecting your browser, displaying security warnings, or simply isn’t behaving normally, you don’t have to diagnose it yourself.
Bring your laptop or desktop to Computers for Change at 196 College Street in Burlington. We’ll assess the problem, explain what we find, and provide a quote before repair work begins.