I too run AVG - & have a problem free PC for years so far!
AVG is so good I'm going to buy into it & get the extras.
& yes - trojans & 'spyware' ( a grey term ) are different things. Trojans get into your system - can change your homepage, install dialers to seriously expensive criminal numbers where your phone bill could mount to $1000's in one call without you knowing it (you can & should dispute these bills with your phone company). It happens to many people including people I know.
Well, I run no antivirus at all
You arec playing with a loaded gun - really!
I have 2 GOLDEN RULES with my PC
1. Backup regularly onto a 2nd hard drive + 2nd PC. (it's easy & for most stuff takes only a few seconds per week drag & drop)
2. Run a good, updated daily, anti virus.
Both have been learned the hard way. More than once on No.1!!
Simplicity is the ultimate sophistication. – Leonardo da Vinci