How can I tell if my computer has a virus? If you have any reason to think a virus is infecting your computer, you should scan your hard drive with an antivirus program like the one provided in the Verizon Internet Security Suite This is the only reliable way to know if your computer has a virus.
Symptoms of computer viruses can vary significantly because there are so many types of viruses. The most common symptoms are:
See Also: What is a virus?
How can I protect my computer from viruses?
How can I remove viruses from my computer?