You see the main problem with the OP is that he's confident that avast will block any viruses at all
avast doesn't detect anything until it's too late
HI WE'RE HERE TO FUCK SHIT UP
COME ON IN I WILL TELL THE OWNER EVENTUALLY, BUT LET'S PARTY FIRST WOOOOO
HELL YEAH 5 DAY INFECT FEST WOOOOOO
5 days later, when you've started to notice shit happen
Oh yeah your computer is fucked up.
Avast also tends to detect keygens, every exe you download ever, the system32 folder, and certain ads as trojans
avast doesn't detect anything until it's too late
HI WE'RE HERE TO FUCK SHIT UP
COME ON IN I WILL TELL THE OWNER EVENTUALLY, BUT LET'S PARTY FIRST WOOOOO
HELL YEAH 5 DAY INFECT FEST WOOOOOO
5 days later, when you've started to notice shit happen
Oh yeah your computer is fucked up.
Avast also tends to detect keygens, every exe you download ever, the system32 folder, and certain ads as trojans