I've had AVG anti virus for quite awhile now, and relied on it's virus blocking software for  
about2 years ,  although recently, floods of trojan viruses have been attacking my comp non stop, and they usually appear as I open firefox... , and oh yeah my bro got his World of Warcraft account hacked  tsk tsk tsk. ( not my problem, although I'm still worried about the key logger software that might be implemented on my PC)

to put it simply, does anyone have advice on:

1. Better antiviruses/ Spyware/ Adware

2. How to kill, this stupid firefox trojan virus ( I tried reinstaling, and installing, nothing)

3. how to stop key loggers?

Helpfull advice IS GREATLY appreciated!!