If your computer - whether Windows or Mac - starts behaving unusually, it could be a sign that someone is trying to spy on it or has installed malicious software on it.
Experts say that sudden changes in performance aren't always just technical problems - they can indicate a real threat to your security.
Signals you should notice:
Sudden slowdowns and freezes – Programs or the system acting abnormally, or a fan whirring for no reason, could be a sign that malware is using up your computer's resources;
Pop-up pop-ups – If ads or applications you don't recognize appear, don't click on them and remove any suspicious browser add-ons;
Antivirus disabled for no reason – Some advanced viruses can disable your protection; if you can't turn real-time protection back on, try booting into Safe Mode and running a full scan;
Browser changes – If your browser's homepage, search engine, or default pages have changed without your permission, reset them and remove any unknown extensions;
Camera turning on for no reason – If the camera light turns on even when you're not on a video call, check the apps that have access to the camera and delete unnecessary ones.
Password change notifications you didn't request – This could indicate that someone is trying to access your accounts – change your passwords immediately and enable additional protection.
What you should do immediately
Take a look at Task Manager (Windows) or Activity Monitor (Mac) to check which processes are using the most resources;
Do a full scan with a reliable antivirus;
Remove any applications or browser extensions you don't recognize;
Reset any changed settings and change the passwords for your important accounts.
If you notice several of these signs at the same time, experts recommend that you act as soon as possible, because the earlier these threats are detected, the greater the chance of protecting your data and privacy. /Telegraph/
