If your PC has a malware infection, it will show you a few signs.
Slowdown, frequent crashes, or the appearance of ads all over the OS are the first warning sign of a malware infection.
Pop-ups showing everywhere on your screen is clear sign of an adware infection.
Encountering a Blue Screen of Death (BSOD) is an obvious sign of malware infection.
A sudden increase in hard disk activity is a clear sign of a potential malware infection.
If network activity is going on suspicious processes or programs, it's possible that your device is infected with malware.
If you see any unusual activities such as landing page changes, toolbars popping up, and redirection to an alternate address, it's a clear sign of malware or adware infection.
Malware is often designed to disable antivirus software, and it doesn't leave users with any defense.
Unknown links sent to your friends through your online accounts could be a sign of malware infection.
Shortcut files on a USB drive or desktop are other signs of malware infection, and they can compromise sensitive data stored on the computer.