One of our readers reported that all the file extensions have changed to some unknown file format. If so, it could be a virus! If a virus has changed all the files extensions to unknown applications, ...

You surely have some idea how a computer virus works, though you may not know the details. Somehow it weasels its way into your computer, and then the computer slows way down…or it starts making ...

Viruses close virusA small program written to cause harm to a computer. can be prevented by taking sensible precautions, including: Anti-virus software can inspect computer files and email attachments ...

Antivirus software protects your computer by scanning every file you download for viruses and other malware. Most of the time, you’ll want to leave your antivirus program running as-is. If it’s ...

We've tested and reviewed both free and paid-for antivirus software. We bombarded each one with tens of thousands of threats to see how well it can cope against viruses, ransomware and phishing ...