Verizon | High Speed Internet - How can I tell if my computer has a virus?

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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:

Inexplicable system crashes
Programs taking significantly longer to start
A decrease in computer processing speed without reason
Excessive attempts to access the hard drive, even for simple tasks
Files are suddenly corrupted or don't work properly
A sharp reduction in available memory and system resources for no apparent reason
Programs or files that are suddenly missing
Programs or files that are created without your permission
A sudden reduction in available hard drive space
The changing of a volume or disk's name
Strange messages or displays on your monitor
The playing of unusual sounds or music at random times