Viruses attacking your Computer system are very common these days. Now in addition to traditional viruses, there are worms, Trojans, spyware, Ransomware, adware and so on. All these are called "Malware". Malware is also known as malicious software. It is designed to cause damage to a computer, server or computer network. But, how do you know your system is under threat. These are some signs which tell, your system is under threat.
The most common symptoms which show your computer has been attacked by viruses and malware is, it starts running slowly. The main job of the malware and viruses is to slow down your computer system whenever you browse on the Internet or simply access local applications. However, before considering your computer has been infected by a virus, you should see if there are any other reasons for the computer slow down.
Your system might slow down if you are running out of RAM. The other reasons for a slowdown may include lack of storage space on your hard disk and damaged hardware.
If you are receiving random messages on your computer screen, there are high chances that your system has been infected by viruses and malware. These popups include advertisements, error messages and so on. You will receive this even if no programs are running.
Have you ever observed files automatically getting deleted from your system? If yes, your system might have been infected by viruses and malware. Usually, viruses and malware delete files and folders from the system and make changes without your permission. In such cases, you should scan the PC for viruses and malware.
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Viruses will affect applications on the PC or laptop. If you are using any app regularly and suddenly you find any errors or if it is taking too long to load, chances are high your system is infected by viruses and malware.
In case you are receiving many messages regarding a program requesting access to your firewall, there are high chances of your system being infected. Users receive these messages as the infected program is trying to send data through the router.
If your system is infected, you will be taken to a wrong site while browsing on the internet. This usually happens when unwanted software has been installed in your system in the form of an extension to the browser. You can resolve this issue by clearing browser cache and uninstalling extensions.
Sometimes, you can find suspect shortcut files on the desktop or drives. This happens when your system is infected with the shortcut virus.
If the modem is blinking constantly even if no programs are running in your system, there are high chances of virus transmitting data over the network.