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Loading ...A virus is a software which can corrupt files and applications on a computer. Viruses are spread from one computer to another through a self replicating process. They infect computers by spreading themselves through the Internet, floppy disks, CDs, DVDs, or USB drives. Viruses hamper the proper functioning of a computer by corrupting important system files. Thus it is essential to troubleshoot virus infections. The detection and removal of viruses can be done in several ways.
If a computer is infected by a virus there will be signs of unexplained software functionality. Some symptoms of a virus infected computer are: applications hang on being executed, the Internet browser opens on its own and displays advertisements, home page changes from what you had set, or a decline in system speed. Your computer might have been affected by a virus if you get error messages that ask you to restart the PC or active programs close by themselves.
An antivirus can be used to prevent, detect and eliminate viruses, spyware, adware, Trojans and other malicious programs from computers. Antivirus programs use signature or heuristic-based methods to identify viruses. In signature-based detection, a database of virus signatures is used to check the contents of a file. The heuristics method is used for zero-day threats for which no signatures are available. Some antivirus use the sandbox technology to emulate the actions performed by a file. If any malicious actions are performed, the file could be a virus. If an antivirus detects a virus, it is deleted or kept in quarantine.
In Windows, you can see the Task Manager to check which processes are running on your system. To check the Task Manager, press ‘Ctrl,’ ‘Alt,’ and ‘Delete.’ If the Task Manager shows a file name that seems suspicious, it could be a virus. You can search the file name on a search engine to check out what it is. You can also get a description of the services Windows is running by executing the commands ‘Msconfig,’ or ‘Services.msc’ in the ‘Run,’ box. You can go to the ‘Run’ box from the ‘Start’ menu. You can also run the Microsoft Registry Editor to check viruses. Execute the command ‘RegEdit’ in the ‘Run’ window. In the Registry Editor, check files in the HEKY_LOCAL_MACHINE folder. If you come across a suspicious file, it could be a malicious program.
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