My Acer with Windows Home Premium came with Windows Defender. I loaded a 90
free trial of Norton Protection Center at the suggestion of the Geek Squad.
The free part is ending soon. I have not had any problems. Do I really need
any protection other than Defender?
Definitely!
For adequate protection, you need three all types of software:
1. An anti-virus program. Windows Defender does nothing to protect you
against viruses, and no anti-virus program is included with Windows.
2. Anti-spyware programs (note the plural "programs." Windows Defender
is an example of this, but a single anti-spyware product--even the
best one--is *not* good enough. Note what Eric Howes, who has done
extensive testing on Anti-Spyware products, states:
"No single anti-spyware scanner removes everything. Even the
best-performing anti-spyware scanner in these tests missed fully one
quarter of the "critical" files and Registry entries" See
http://spywarewarrior.com/asw-test-guide.htm
3. A firewall program. You can use the built-in Windows one, or choose
a third-party one instead.
My view, by the way, is that anything Norton is the *worst* possible
software you can get. There are many better alternatives.
My view of the Geek Squad is similar to my view of Norton products.
They are not a company I would recommend using.