can nod32 protect me if i run packed virus?

can nod32 protect me if i run packed virus? and nod32 can not discover it only after extraction


what will happen if click it ?

can the trojan destroy the nod32 ?
can it block it

 

also

what is better ? find the virus by On Demand scan or by realtime protection?


about my self . last month i have download prorat trojan as flash game so i scan it by nod32 and i found nothing so i click it but after that the nod32 alarm me there is trojan
so i restart my computer and i scan my computer again again and i also nod32 alarm my there is virus in my system32 folder !!!
so the realtime can not prevent the infection
so i format my computer than i use KAV and scan the same file and found the trojan

so if i know there is a tojan i will not click it


also id like to know what is the differnet between packed and run-time
i found this in nod32 and i dont know what is the diffrent between them

 

It appears you have found NOD's weakness.

 

Packed (aka Archived) are ZIP,RAR,ACE,7z archives, run-time packed are UPX,UPack,PE_Compact etc...
Archives are "cached" to disk at extraction point, runtime packers are extracted directly in memory without disk in between.