Wondering how to tell if your computer has a virus? The most common signs are a computer that suddenly gets slow, strange pop-up messages, new programs you did not install, and a web browser that acts on its own. The good news is that most viruses can be cleaned up, and there are simple, safe steps you can take today.
A “virus” is a harmful program that gets onto your computer without your permission. People often use the word for any kind of bad software. You just need to know what to look for and what to do next.
Quick answer
- Watch for sudden slowness, odd pop-ups, new programs, and a browser that changes on its own.
- Do not call any phone number in a pop-up. Do not pay anyone who contacts you out of the blue.
- Restart your computer and run the virus scan that came with it.
- If the problems keep coming back, ask a trusted local pro for help.
Sign 1: Your computer suddenly got much slower
Computers slow down a little as they get older. That is normal. But if your computer was fine last week and now takes forever to do simple things, that is worth noticing.
Some viruses run quietly in the background. They use up your computer’s power, so everything else has to wait.
Sign 2: You see lots of pop-up messages
A pop-up is a small window that appears on top of whatever you are doing. A few pop-ups on websites can be normal. Watch out if:
- Pop-ups appear even when your web browser is closed.
- They say your computer is “infected” and you must act now.
- They show a phone number and tell you to call.
A pop-up with a phone number is a big red flag. Real companies do not ask you to call them this way. Close the window and do not call.
Sign 3: New programs or icons appeared
Look at your desktop and your list of programs. Do you see anything you do not remember adding? Some harmful programs sneak in alongside free downloads. Others show up after clicking a bad link.
If you see something unfamiliar, do not open it. Make a note of its name.
Sign 4: Your web browser acts strange
Your web browser is the program you use to visit websites, like Chrome, Edge, Firefox, or Safari. Signs of trouble include:
- Your home page changed and you did not change it.
- Searches go to a website you have never heard of.
- New toolbars or buttons showed up at the top.
- You keep getting sent to websites you did not ask for.
Sign 5: Friends get odd emails or messages from you
If people tell you they got a strange email from you, with a link or a request for money, your email account may have been taken over. Sometimes this happens because of a virus on your computer. Sometimes someone simply guessed or stole your password.
Either way, it is a good idea to change your email password from a computer you trust.
Sign 6: Your computer crashes or freezes often
A crash is when the computer suddenly shuts down, restarts, or shows an error screen. Freezing is when nothing moves and the mouse will not respond. Many things can cause this, including old parts. But if it started suddenly along with other signs on this list, a virus could be part of the problem.
Sign 7: Your security program is turned off
Most computers come with a built-in virus checker. On Windows it is called Windows Security. Some viruses try to turn this off so they can hide. If you find it turned off and you did not do that, take it seriously.
What to do if you think your computer has a virus
Take a breath. Most problems can be fixed. Here are safe steps you can try.
- Do not call any number on a pop-up. Close the window. If it will not close, turn off the computer by holding the power button.
- Do not give anyone your passwords or bank details. No real company needs them to fix a virus.
- Restart your computer. This clears out some problems and gives you a fresh start.
- Run a virus scan. On Windows, click the Start button, type “Windows Security,” open it, and choose “Virus and threat protection.” Then click “Quick scan.” Follow any steps it gives you.
- Remove programs you do not recognize. Only do this if you are sure you do not need them. If you are not sure, leave them alone and ask for help.
- Change important passwords. Start with your email and your bank. Use a different computer or phone you trust if you can.
- Back up your photos and files. Copy your most important things to a USB drive or other safe place, just in case.
If you feel unsure at any step, it is fine to stop and call for help. You will not make things worse by asking.
How to help prevent viruses
A few simple habits go a long way:
- Keep your computer updated. Updates fix weak spots that viruses use.
- Only download programs from websites you trust.
- Do not click links in emails or texts you were not expecting.
- Use a good antivirus program and keep it turned on.
Our remote support plans include antivirus, a VPN (a tool that helps keep your internet connection private), and regular tune-ups. Plans run from $29.99 to $99.99 a month, and family plans cover up to 5 devices.
When to call a pro
Some viruses are stubborn. They hide, come back after you remove them, or keep your security program from working. If you have tried the steps above and things still feel wrong, it is time to get help.
AA Computer Help offers virus removal in a way that fits your life:
- In-home help. We come to you across Greater Hartford and 80+ Connecticut towns.
- Remote support. You start the session, you see everything we do on your screen, and you can end it anytime. We never call you out of the blue.
- Mail-in repair. Send us your computer and we will send it back fixed.
All of our work comes with a 30-day workmanship guarantee. We are open 7am to 11pm every day.
Call us at 203-340-4198 or book an appointment.
Frequently asked questions
Can a virus fix itself if I just wait?
No. A virus will not go away on its own. It may even get worse over time. Running a scan or getting help is the best move.
Is it safe to keep using my computer if I think it has a virus?
It is best to avoid online banking, shopping, or typing passwords until you know it is clean. Simple things like reading saved files are usually lower risk, but the sooner it is checked, the better.
How do I know if a virus warning is real or fake?
A real warning comes from the security program on your computer. It will not ask you to call a phone number or pay right away. If a message pushes you to call or pay, treat it as fake and close it.
