WRONG WRONG WRONG!
Sorry to (yell) but AVG is not that good of an option any more. Not saying its bad but there is better out there. Here is how it goes:
Free Software:
Antivirus: (in order)
Avira (only problem with this AV is that it is "nagware." Basically it asks you to purchase it when you update it. However it is a great scanner.
Avast
AVG
AntiSpyware:
SuperAntiSpyware
SpyBot Search and Destroy= okay @ best.....
Ad-Aware=see above
AntiRootKit:
F-Secure Blacklight
Panda AntiRootkit
RootKit Revealer
FireWall:
ZoneAlarm
Comodo (lovely)
So here is the layout for layered computer security:
Web Browser: FireFox with NoScript extension OR Opera
AntiVirus: Avira
AnitSpyware: SuperAntiSpyware
Firewall: Comodo or ZoneAlarm (I am a ZA user however Comodo freakin rocks)
Operating System: Any choice has vunerabilities, however Linux and Mac OS' tend to have fewer known issues. BUT the key to preventing issues is to reguraly update EVERYthing.
RootKit Scanners: Not needed, BUT its nice to scan every so often.
Now there is some better all in one PAID options but they are not really needed if you can remember to manually scan once a week.
PS: As for AV reviews:
http://www.av-comparatives.org/