The link to Windows Secrets does in fact recommend a suite. They used
to do point products; I can't recall when they changed.
Recommendations aside, suites can potentially be more efficient than
point products. McAfee Enterprise, for instance, uses one engine for AV
+ AS so a single scan covers both. That can mean a lot less overhead
(RAM, CPU, processing time) than having product A do the AV scan then
product B scans it for spyware while product C is monitoring LAN traffic
while product D filters spam.
Of additional potential value is the trend towards blended threats where
a virus contains spyware (or some other combo). There's no reason why
this scenario couldn't occur: A standalone AV package skips a threat as
they've chosen to classify it as spyware while the AS vendor could do
the reverse; classify it as a virus and not update their
definition/detection engine. Result: The malware gets by both packages
and infects your PC. A suite shouldn't be susceptible to this scenario.
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