McAfee's Virus Research team is constantly updating its library of 'known' viruses and spyware. At the core of McAfee software is something called 'heuristic' protection...which looks for suspect behavior by any program or file in your computer
And now you may ask - how this technology gets updated to my computer ?
- Through DAT's that installs to your computer by the way of updates that takes place frequently (yes that tiny little revolving icon is the key factor that protects the computer from those vulnerable elements over the internet)
But, Even so, the constantly-changing nature of viruses and their different variants makes 100% security impossibility, with any anti-virus software. So, make sure that you do not click on any attachments in email from unknown person or download any data from untrusted site (more riskier).
As of now , just perform a complete update with your security program, and then run a full scan of the computer - That should do its job of not only detecting but also removing any virus/spyware if found.
Also, just go through these 13 Ways to protect your system which will help you surf worry free over the internet.
For any other assistance we are here with you
McAfee Online Community Moderator