If you’re noticing strange behavior on your computer, it could be a sign that malware (a virus) has infected your system. Below are the most common signs that your computer might be compromised.
A computer that suddenly runs much slower than usual is one of the most common signs of a virus. If programs take longer to open or your system responds slowly, be cautious.
If new tabs open in your browser without your action, unknown programs appear on your desktop, or you’re bombarded with pop-up ads, it’s a strong indicator of malware.
Check Task Manager (Windows) or Activity Monitor (Mac). If your CPU, disk, or RAM usage is unusually high even when idle, malware might be running in the background.
If your antivirus keeps detecting threats, take it seriously. But note that some viruses can also disable your antivirus software.
If your files suddenly disappear, get renamed, or you can’t open them, this could be a sign of ransomware.
Frequent disconnections, or suspicious emails being sent from your account without your knowledge, can indicate a virus infection.
If your browser homepage has changed, your search engine is different, or system settings have been altered without your permission, stay alert.
Run a full system scan with a trusted antivirus program.
Uninstall suspicious programs from Control Panel or Settings.
Check browser extensions and remove unknown add-ons.
Backup your important files and consider a system restore.
If the problem persists, it’s best to seek professional help.