How do I know if there is a virus on my computer?

How do I know if there is a virus on my computer?

Several symptoms can indicate a computer virus. Which includes:

• Your programs only work very slowly and erratically.
• Your computer system responds very slowly to input with the mouse or keyboard.
• Your hard drive's LED flashes continuously and indicates continuous activity, even if you're not running any programs.
• When surfing the Internet, pages do not open or the image constantly freezes, for example, when watching an online video.
• You constantly receive unwanted advertisements every time you open your internet browser.

These symptoms do not always have to be caused by a virus. Sometimes it is enough to clear the browser cache or clean the computer.