Professional Nerds agrees with Sophos...
...that "defense in depth" is necessary to protect your computer and its information about you.
a) Microsoft Automatic Updates are turned ON
b) Valid Subscription to REALLY GOOD Internet Security software
(Professional Nerds has preferred Norton since 2009)
c) Ad Blocking software such as Ad Block Plus to protect against deceptive
and misleading internet ads
d) Updates to essential PLUMBING such as
1) Oracle Java (currently v8u31, or v7u76 for XP)
2) Adobe Reader (currently v126.96.36.199)
3) Adobe Flash, which was just updated again TODAY, Monday 1/26/15; to v188.8.131.526
to fix two new "Zero Day" vulnerabilities.
Avoid FAKE updates, here are verified update links:
Ad Block Plus (install in EACH browser you use):