Posted On 13 Nov 2025

Malware—short for malicious software—is one of the biggest threats to computer users today. It can steal your personal information, slow down your system, and even render your computer unusable. Recognizing the warning signs early can help prevent serious damage. Here are 7 common signs your computer might be infected with malware:

1. Slow Performance
   If your computer suddenly becomes sluggish or takes longer to boot, malware could be consuming system resources in the background.
2. Pop-Up Ads
   Frequent, unexpected pop-up ads—even when you’re not browsing—are a clear red flag. Many forms of adware install hidden pop-up generators.
3. Crashes or Freezes
   Malware can corrupt important system files, leading to random crashes, freezes, or the dreaded “blue screen of death.”
4. Unknown Programs Installed
   Notice apps or icons you didn’t install? Malware often downloads and installs additional programs without your consent.
5. Browser Homepage or Search Engine Changes
   If your default homepage or search engine has changed and you can’t reset it, a browser hijacker may be at work.
6. Disabled Security Software
   Some malware is designed to disable your antivirus or firewall so it can operate undetected. If your security software won’t open or keeps turning off, take action immediately.
7. Unusual Hard Drive Activity
   Constant or noisy hard drive activity when you’re not doing anything intensive could mean malware is accessing your files or communicating in the background.

If you notice any of these signs, run a full antivirus scan immediately, update your software, and consider using malware removal tools. Staying vigilant and proactive is key to keeping your computer and personal information safe.