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You cannot be protected and safe from the online threats like virus, Trojan, worm etc. when you are online unless you are proactive and exercising best practices. Despite that you are exercising best browsing practices, your computer may catch a virus. Here is a comprehensive, free virus removal support guide that answers your “Do I have a virus” question by letting you run a series of self-tests.
Step 1
Open your antivirus software, update it with the latest virus and spyware definitions, and then run a full virus scan (not a custom scan). Wait for the scanning to complete. When done, you will see the infected files in search results. Prompt the antivirus software to delete the infected items and clean your computer.
Step 2
Some viruses are too powerful to be detected by your antivirus. Yes, they can easily dodge your antivirus when it runs a virus scan by masquerading themselves as legitimate applications. So after having run a virus scan from your antivirus, download Malwarebytes, a powerful virus scan and removal tool and install on your computer.
Step 3
When done, open Malwarebytes and start updating it. When done, run a full virus scan. Wait while the scan completes. If Malwarebytes scan results show infected items, remove them. Other than this, you can run an online virus scan from a legitimate website like McAfee or Trend Micro etc. You can run online virus scan even if you have an antivirus program installed on your computer and even if you have none.
Step 4
Download the online virus scanner and install it on your computer. When done, run a full virus scan and repeat the procedure. If you have a firewall installed on your computer, you can easily detect if you have a virus on your computer or someone has tried to hack it. A firewall program is designed to scan the incoming and outgoing traffic to and fro your computer and block unauthorized users (hackers) from breaking in without your knowledge and consent.
Step 5
A firewall program always logs the entries of programs that try to automatically connect to your computer or send or receive data without your consent and knowledge. It blocks such programs and logs their details. You can view the details and take the desired action against such programs. Another way of finding out if you have a virus on your computer is checking your emails. If you see lots of spam emails in your email account, a virus might have intruded in your PC.
Step 6
If you occasionally or repeatedly see weird error messages while rebooting your computer or opening, running, or closing a program, it indicates that a virus is present on it. One such error is the Blue Screen of Death error or blue screen error that mostly appears when your computer encounters a virus infection and immediately shuts down to prevent it from breaking in the Windows Kernel system. Though the BSOD (blue screen of death) error can occur due to hard drive fail, software compatibility, or driver among other issues, but virus infection is the main reason for it to occur.
Step 7
If you cannot access your antivirus program and run a virus scan, open Task Manager, internet connection, or anything on your Desktop computer. The only way you can get into your Windows is by rebooting your computer in Safe Mode. It clearly indicates the presence of a virus or many viruses. When you open your web browser, it shows a different home page but not yours and takes you to malicious, sales, or adult websites when you search for something. Yes, it alters your search engine and search results.
Step 8
One such virus is Google Redirect virus, which when gets on to your computer alters your searching and redirects you to fake search results and websites of fake free virus removal tools. Another self-test is checking if your computer is trying to reboot or shut down without your intervention. If you desktop shows programs other than your regular ones, which might also be missing, you can be sure that it has a virus.
Step 9
If a program is eating higher memory resources and CPU amount, it surely is a virus and not a legitimate program. Some high-end applications like heavy graphics software, financial applications may consume higher memory and CPU resources, but they may not slow down your computer like a virus does.
Step 10
When you have determined that your computer has a virus, immediately end its process in Task Manager and then run a virus scan from your computer. if you cannot access any of these programs, forcibly shut down your computer and reboot it in Safe Mode. If you are unable to get rid of the virus, contact the professional virus removal support service.
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Source by Gaurav Srivastava