Posted 22 January 2007 - 07:05 AM
You should not use more than one anti-virus program due to conflicts that can arise when both are running in real-time mode simultaneously. In contrast, using more than one anti-spyware program running in real-time mode simultaneously increases your protection coverage without causing the same kind of conflicts or affecting the stability of your system.
No single product is 100% foolproof and can detect and remove all threats at any given time. The security industry is in a constant state of change with new infections coming out on a daily basis. Each vendor has its own definition of what constitutes spyware and scanning your computer using different criteria will yield different results. The fact that each program has its own definition files means that some malware may be picked up by one that could be missed by another. Thus, a layered defense using several products to supplement your anti-virus provides the most complete protection.
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