Signs Your Computer Has a Virus

How to tell if your computer is infected with malware and what to do about it.

Category: Troubleshooting | Read time: 2 min | By Midland Computers

Common Signs of Infection

Viruses and malware don't always announce themselves. Here are the warning signs to look for:

Performance Issues

  • **Computer is much slower than usual** - malware uses your computer's resources
  • **Programs take forever to open** or crash frequently
  • **Your hard drive is constantly active** even when you're not doing anything
  • Strange Behaviour

  • **Pop-up ads appearing** even when you're not browsing the web
  • **Your homepage or search engine has changed** without you doing it
  • **New toolbars or programs** appeared that you didn't install
  • **Your browser redirects** to websites you didn't intend to visit
  • **Friends receive emails or messages from you** that you didn't send
  • Security Warnings

  • **Your antivirus has been disabled** - some malware turns off your protection
  • **Fake security warnings** telling you to call a number or download software
  • **Unable to access certain websites** (especially security-related sites)
  • Ransom Demands

  • **Files are encrypted** and you're asked to pay to unlock them
  • **Screen is locked** with a message demanding payment
  • What to Do If You Suspect Infection

  • **Disconnect from the internet** - this prevents the malware from spreading or sending your data
  • **Don't enter any passwords** or banking details
  • **Don't pay any ransom** - there's no guarantee you'll get your files back
  • **Run your antivirus** if it's still working
  • **Bring it to a professional** - some infections require specialised tools to remove
  • The sooner you act, the better the outcome. Some malware gets worse the longer it's left untreated.

    **Think your computer is infected?** Bring it to Midland Computers. We can remove viruses and malware while preserving your files in 99% of cases.