Spyware is a form of computer virus that infects your computer with the intention of watching and recording all of your activity. They would then use this information and attempt to steal personal information. Certain points to watch out for, when your PC may be infected with malware, are:
Favourites or links in your web browser that you don’t remember adding.
Your mouse cursor has changed unexpectedly.
Pop-ups appear even when not connected to the internet.
Your computer has started running slower than normal.
How To Tell If Your Computer Is Infected With A Trojan Horse Virus.
Trojan Horse viruses often appear as legitimate software downloaded from a safe source but are in fact malicious files which can harm your computer. Once infected with the virus you run the risk of losing all of your files on the computer. Symptoms of a Trojan Horse virus are:
Pop-ups will appear telling you that your PC is infected and that you should download a particular anti-virus. This anti-virus is often the Trojan Horse virus itself.
You may locate and delete the virus, only to have it reinstall itself repeatedly.
Trojans are often contained in e-mails seemingly containing images, gifs, screen -savers or other information. Once you have opened the e-mail the virus will then install itself onto your computer
How To Tell If Your Computer Is Infected With A Worm.
Computer worms look to exploit the loopholes found in various operating systems and use them to copy itself into various places on your computer. Worms are difficult to detect as they will often use more than one method to spread onto your computer. Some of the symptoms of a computer worm are:
They will often attach themselves to e-mails as suspicious files. Do not open these attachments!
A worm copies itself to the point that it starts taking up large sections of hard drive space. Keep an eye out for this.
Worms will often slow the running speed of your computer. If programmes are taking longer to open, your computer may be infected with a computer worm.
Worms will often infect crucial files in programmes to the point that these programmes become inoperable.
You could avoid computer viruses all together by avoid conspicuous sites, by not opening emails from unknown sources or that contain suspicious attachments. There is also a lot of antivirus software that is freely available on the internet that can help you protect your computer from damaging viruses.