The number of Internet users in the world has doubled over the couple of years , creating a big opportunity for cyber criminals to take advantage of loopholes in our system, therby using malware and virus to cause problems.

We all have basic knowledge of what computer virus are and what they can do to our systems. Some of these malware can even replicates itself until you have no space left on your device, some others can corrupt our data and make computers unstable, some also uses people e-mail addresses to send malicious codes to everyone on the mail’s contact list.

This article will show you what the main symptoms of a malware infected computer are. You’ll also learn to correctly evaluate the risk and know where to look for a solution.

1) Slow Response



It is a very popular fact that malware and virus slows down the operating system due to so many illegal activities the program is trying to do. If you notice your computer is slow and you are not using any resource-heavy program, check other cause first. The computer might be slow due to unavailability of space in the RAM, a fragmented system or an hardware issue.

If you have already thoroughly verified these possible causes and all seems fine, you can start considering a potential malware infection.

2) Frequent OS Crashes



The famous BSOD (Blue screen of death) is the clear warning that your computer is not working properly and is infected by virus or malware. Sometimes the BSOD appears when the PC is not configured well i.e outdated drivers , bad registry e.t.c

3)Too Many Popups



One of the most annoying signs of malware is represented by the unwanted pop-up windows. Unexpected pop-ups which appear on the system are a typical sign of a spyware infection.

Pop-ups are usually very annoying, and most times they usually come bundled with other concealed malware threats, and which could be far more destructive to our PC.

4)Antivirus GONE, Firewall disabled!



One of the characteristics of virus and malware is their ability to turn off your security systems( Anti-virus , firewall e.t.c) making your PC more vulnerable to exploits. If one thing shuts down it might just be a specific software failure; but if all your security components are disabled, you are almost certainly infected.

5) Shortcut files



If you see shortcut files on your desktop there are chances your computer is having a shortcut virus. So if you see such shortcut files in you Computer or then these are the sure signs that your computer or pen drive contains the stubborn Shortcut virus. We have an article that can help you remove shortcut malware here>>>http://smartgeek.com.ng/2016/09/01/remove-shortcut-virus/

6) Unusual Network activities



There are situations where you are not connected to the internet and don’t have any background running app that is accessing the internet, but high network activity can still be observed.

First of all, we need to check the following:

Is there any Windows update at that moment?
Is there any program or application that’s downloading or uploading any data?
Is there any update for a certain app running at that moment?
Is there a large download that you started and forgot about, which may still be running in the background?
If the answer to all these questions is No, then maybe you should check where all that traffic is going.

To monitor your network, you can use one of the following programs:GlassWire, Little Snitch or Wireshark.

Source >>>http://smartgeek.com.ng/2016/09/22/recognize-computer-virus-infected/

Nice post

However there are many other signs also that show your PC/laptop is having the virus infection like[b] new browser homepage or opening unwanted websites, you are getting redirected to the website all the time, renaming of the folders and files, getting strange messages or programs start automatically and many more.[/b]

Well, these are the common symptoms of virus infection. So if your system is infected then scan your system with the good anti-virus program.

The entire information is taken from - http://fixwindowserror.weebly.com